protection issuing a major warning to agents urging them to watch out for explosive devices at the southern border, as we cap off a busy week at the u.s.-mexico border. hello, john roberts in washington. end of the week. sandra: we made it this far. sandra smith in new york. internal memo obtained by fox business says the mexican military seized 10 ieds filled with black powder and shrapnel, found in mexico at the arizona-mexico border. john: and a gun fight in mexico. hillary, we are hearing the dhs secretary is on the hill today. has he had any response? no, he has not. he did not say anything to reporters asking for an update about the border immigration talks on this border deal that congress is trying to work through here. but in regards to this story, we do know that border patrol is warning agents to be careful after the mexican military found 10 explosive devices on the mexico side of the u.s. border. a federal law enforcement source shared with us an officer sa