Reporter, you can see Police Officers walking slowly through parliament with weapons drawn. Then you hear shots ring out inside the building. Right now members of parliament are still holed up inside their offices. Joining us now on the phone is justin lang, a freelance journalist live tweeting from inside parliament. Justin, tell us about the experience, what you saw and heard while you were inside of parliament today. Im actually still in parliament. I wont say where i am because we dont know if theres an active shoot other loose. I can tell you that i am somewhere in centre block where the shooting took place. This morning i was coming into my office on the third floor of parliament and it connects to a hallway that overlooks the hall of honor, which is where we believe the suspect was shot and killed. I took a different route and subsequently ended up in a different part of the building. But i was i was heading back down to my office, i had a i had a member of Parliament Come up to me and say there was an active shoot other loose and i should barricade myself somewhere. I went back across the hall to the room i was in. There was about two dozen people waiting. And i told them what had happened. You can kind of hear them behind me, getting a bit of cabin fever, as were all still on lockdown. From there we basically waited in the room for some time until Security Guard came in and told us, indeed, there was an active shooter in the building. They believed he was in the building. We then kind of barricaded ourselves in the back of the room. And we did hear at some point what sounded like gunshots in the stairwell, the fire exit behind us. Were not sure if those are gunshots but a series of very loud bangs, five or six in a row. There was some belief it was gunshots. Very harrowing. Hang on for a second, because i want to bring in by phone mark from the Canadian Police. Are we talking now about potentially one or more than one gunman . Well, with the limited information we have, we were not sure how many suspects. Were still actively looking. There was some erroneous information earlier that was reported on a lot of news outlets that there was an additional location near a mall. Is that now not a part of this investigation . Yes, contrary to earlier reports, there was no incident near the rideau centre, the mall. We were talking to a journalist whos still on lockdown inside parliament. Any idea how Long Parliament will remain on lockdown . Well, its going to remain on lockdown as long as were still actively searching. Until we exhaust all avenues or all leads. The Downtown Core will remain in lockdown. Are the Ottawa Police still cautioning people, i assume, to stay away from downtown . Oh, yes, we are. Thank you very much, mark from the Ottawa Police. Really appreciate it. Youre welcome. Justin, i dont know if you were able to hear that. Theres not real clarity on how many gunmen potentially were talking about. And sort of an indefinite lockdown for you. And youve been live tweeting this. Just tell me, are you with other people or are you somewhere on your own . No. Theres about two dozen of us in this room. Were looking at the tv, trying to keep abrust of whats happening. A lot of us are using twitter because twitter is prevalent among staff, the reporters here. Were keeping our eyes on the phone to see what the latest updates are. Were not surprised the lockdown will be ongoing for a little while. We were told the lockdown would be lifted once the building has been cleared. That hasnt happened yet. We havent seen any s. W. A. T. Teams or Police Officers on our floor in the last several hours. We dont believe that will be any time soon. Until that happens, were all bunkering down here. All right. Justin ling, stay safe. I appreciate you being on with us. Thanks. Lets bring in nbcs Pete Williams live from washington, d. C. Pete, what do u. S. Authorities know at this point . Reporter not much. Canadian officials have their hands full, so were not really going on what u. S. Officials are saying. Were learning a lot more from the canadians. It appears from this statement the police have put out that two people were killed today. One is the reserve soldier at the military memorial. But the second is the gunman inside parliament. They do say one male suspect has been confirmed deceased. So, were still waiting on word, as you were just trying to get it there from the police, about whether, in fact, there was more than one person with a gun. There are many people who thought they saw that. And the Canadian Police have to assume that that could be true. Thats why theyre doing what theyre doing. Here in the u. S. , joy, weve not heard any signs or any statements or any indication that security is being changed. No visible security change at our version of the Parliament Building in ottawa, at the u. S. Capitol building or the white house. Not much changed at the canadian consulate here in washington. Just the procedure of how you get in the door. Not in lockdown. No change in terms of u. S. Military. And the last word, the department of Homeland Security wasnt going to change anything. And i think its important, just to remind everyone here, that in the last several years the department of Homeland Security, as it got away from the colorcoded threat system, now doesnt raise the terror alert level here unless there is specific credible intelligence of an attack in the u. S. So, it wouldnt be their style, it wouldnt be their normal operating procedure just out of an abundance of caution because something happened in a neighboring country to raise the terror alert level or change the posture of things here in this country. Nonetheless, its important to note that the canadian officials have been on a heightened state of alert there for the last several weeks in response to a growing amount of intelligence about people in isis wanting to carry out attacks in canada against both u. S. And canadian targets in canada. Pete, there were we dont yet know who was behind the attack today, joy. As we continue, as we wait for the News Conference to begin in ottawa. Pete, there was a previous incident in canada, correct, that involved somebody they thought had islamic extremist leanings, recent convert to islam, who hit a couple of officials with his car, killed one. What do we know about that . And is that well, i mean, we dont know if thats related. That happened recently, correct . Two days ago, near montreal. A man parked his car in a parking lot outside a military recruiting building, a building that had a lot of other facilities, including military ones, sat in the parking lot for two hours until one man in uniform came out with another, who was not in uniform. He rammed his car into them. One was killed. One was injured. The man drove away. His car flipped over. He got out. Had a knife and was shot dead by Canadian Police. All right. Thanks for those updates, Pete Williams, appreciate it. You bet. Anthony roman is a security expert, Jim Cavanaugh, i want to bring both in while we wait for that News Conference. Tony, nltsot a lot of informati. One male suspect. Theyre keeping the capital on lockdown, essentially, indefinitely. Theres really no way the one suspect is now deceased, how do you even proceed in trying to figure out if this was a conspiracy or just a lone wolf . What theyre going to do is review all of the security cameras in the area and all of the videos, try and find eyewitnesss who may have filmed anything. That would be done by the investigators working outside of the perimeter and in the perimeter at this time. But the priority is to clear the Parliament Building, to make sure there are no other shooters there. There are eyewitness accounts and tony and i were talking earlier in the break before we came on, thats not necessarily so reliable because someone can see the same person twice and think they saw two people. Its not unusual or is it unusual for it to be unclear whether youre talking about one person or more than one person . Ive never been to one of these active shooter situations where you didnt get reports of multiple gunmen. You always get reports of multiple gunmen, even if theres one shooter. So, that has to be sort of flushed out. And each witness has to be looked at and what they say they saw. Like anthony said, review the videotape. But what investigators need to do quickly in these cases is to go to the deceased person and obtain any identification papers on them. Sometimes they could have a suicide note, they could have their wallet, they could have all kinds of things carried in their pockets. Necessity have a firearm that can be traced. And theres a car apparently left outside the Parliament Building that can be tracked for registration and so forth. You want to find out who the person is, this deceased shooter, and who are his associates and track back quickly from that. It remains to be seen, like pete said, joy, you know, if theres a second shooter. There is a lot of reports of that, but sometimes thats Police Seeing a policeman with a gun or something else. So, if its multiple shooters, it raises the bar a little bit of, you know, not necessarily a mad man who had a grudge against the government and it could fall into, you know, a lot of these warning signs, which you cant confirm it, you cant say it for sure, but tipping a little bit more toward internationally inspired terrorist act with the Canadian Military engaged in the middle east in the last few days, with the threats from overseas, with the runover of the canadian soldier. All these things add up to make that a top priority for investigators to look at. Right. We see the setup continuing of that press conference. Im assuming because canada has been on high alert and there has been some chatter, also they would be monitoring social media for anybody that might be talking about this or sort of taking responsibility. Is that part of the investigative process now or after they clear the immediate situation . Well, different units of the rymp, Royal Canadian mounted police, are important for protecting the Prime Minister and other senior members of parliament. The Tactical Units are there to clear the building and to ensure that there are no other shooters. Then you have the regular Police Officers who would cordon off the perimeter and watch that. With this situation with isis, whenever you have the United States, canada and some of the western allies attacking in force a terror group like isis, you can expect that there will be some homegrown terrorist sympathy for that. That has to be investigated. And social media is one of those elements. And as jim point out, of course, searching the body for evidence, looking for forensic evidence, tracing the rifles. All of that is part and parcel of this. Jim, the person, am i wrong, does not even necessarily have to be in coordination with anyone. It could just, as tony said, somebody with that sympathy and still be acting on their own, no . No, exactly, joy. I mean, it could be somebody whos internationally inspired, we call it, internationally inspired, even radicalized even over the web if the mode was terrorism. But, you know, when you look at motive, you also look at the targeting. Who is the person trying to kill . If we look in recent history, the people that have been trying to kill soldiers, and we can take that back to ft. Hood, internationally inspired terrorism. We can go to london with the machete attacks on the london soldiers, Carlos Bledsoe from ten fen who shot the he recruiting station, the soldier run over by just the other day in canada. So whos targeting those people are internationally inspired terrorist groups. Not so much just made men or or people with a grudge against the government. So, he attacked a soldier first and then he went to the government building, the parliament. Targeting is important to consider when youre trying to deduce what the motive of the shooter is. Thats interesting, because weve had homegrown terrorism that had nothing to do with International Sort of inspiration, you talk about the Timothy Mcveigh incident, targeting the federal government. So is that part of it, looking at the target and walking backwards to figure out potentially what the ties might number. Well, homegrown terrorists, criminals all follow a pattern we call it modus operendi. What telltale signs do they leave behind and what are the elements they leave behind in each terror attack or crime. Jim is absolutely right. For the last several years there has been a preponderance of repeated attacks against soldiers. And in the london case in which the soldier was terribly, terribly attacked, first hit by a vehicle and then fundamenta y fundamentally, you know, butchered, this may follow that kind of pattern since we saw Canadian Police and soldiers injured in the same kind of way. Someone exiting with a knife. So, it does follow the same m. O. , as we call it. Of course, this is you have Prime Minister of canada looking to speak with oh, the press conference is beginning. Lets pause and take a listen as they prepare to get started. I dont think theyre seated quite yet. I wonder if i have time to ask jim. The United States obviously monitoring this very closely because were leading those attacks against isis. What kind of security measures would be going into a place on our side of the border, very briefly . Well, you know, pete said they havent ramped up anything, but i can tell you the mental state of all our police, facilities, police and Security Officers are up on this. Whether or not theyve been ordered to change, mentally they know whats going on here. They watch the news and theyre more mentally acute today than yesterday. Theyre constantly on guard. Thats what happens. Ive been on these security details. Naets what happens to you. You know whats going on, so you pay attention. Indeed. Lets listen in to this press conference, now that everybody has found their seats and listen to the update out of canada. Remains ongoing. Please be mindful due to the ongoing situation and investigation, there will be many answers that we will not be able to answer at this time. Id first like to acknowledge the presence of Ottawa Police chief charles bordelou, Commanding Officer of rcmp, to his right Major General christopher coates, Deputy Commander of joint operations command, and finally to my far right, mayor of ottawa, jim watson. In terms of proceeding with the press conference, we will first have a statement by Ottawa Police chief charl. At 9 52 a. M. , the ottawa politician Service Received multiple 911 calls regarding a shootinging at National War Memorial. The victim of the shooting is a member of the Canadian Armed forces. His injuries were fatal. Our thoughts and prayers are with the member, his loved ones and other members of the forces. His identity and age wont be confirmed at this time as we are in the process of contacting his family. What followed was another incident on Parliament Hill. What i can tell you is that a male suspect is now deceased. Together with the rcmp, all available resources have been deployed to this Ongoing Police operation. Our priority is the safety and security of our community. Additional resources are on standby should they be required. All measures have been taken to ensure the safety and security of our residents. We are very aware of the large presence of military personnel in our community and i want them to know that we are committed to their safety. As i said, this is an ongoing operation. We are asking members of the public to stay away from the Downtown Core. People in the Downtown Core are asked to follow the instructions of their buildings management. The Ottawa Police service is looking for witnesses to come forward with information regarding the incident that took place this morning. Witnesses can contact our major crime section, 6132361222, extension 5493. And the rcmp set up an email address for public tips. We continue to communicate and work actively with our partners, including those in neighborhood jurisdictions. [ speaking french ] [ speaking french ] so, were listened to Royal Canadian mounted police, theyre doing it in french because theyre a dual nation. They talked about condolences to the one deceased. Its an active situation. Theyre actively investigating. Jim cavanaugh and Anthony Roman are still with me. Lets talk about the response. We still have people locked down. Why not escort the people who are currently on lockdown out of parliament and just empty empty the building . The priority right now is to search for the shooter and to protect as many residents of parliament and members of parliament and their staff as possible. We dont need a lot of civilians right now in the hallways where units of police are coordinating can mistake one for the shooter and we have a terrible tragedy, or perhaps the shooter blend in with the crowd and escape in that matter. In the kenyan mall attack we are regrettably units of the police that were shot