usually takes care of mosque and helps in parking and other stuff. so he saw an opportunity and pounced over him and grabbed his gun. >> grabbed the gun from his hands as he was shooting? >> yes. >> reporter: police go into lockdown. boy the time it's over, 49 people are dead. dozens, including children with gunshot wounds, are admitted to christchurch hospital for treatment. >> injuries ranging from gunshot wounds to the head and face, arms, leg and torso and soft tissue injuries. >> reporter: investigators recover weapons at both locations, plus two intro viezed explosive devices attached to a vehicle. police arrest a 28-year-old man now charged with murder. two others are arrested for suspected weapons possession. none of them had been on any security watch list. >> we had -- no agency had any information about these people.