"The suspect rammed his car into two of our officers and then hit the north barricade barrier.

At such time the suspect exited the vehicle with a knife in hand," Pittman said in a press conference.

"Our officers then engaged that suspect. He did not respond to verbal commands. The suspect did start lunging toward US Capitol Police officers at which time US Capitol Police officers fired upon the suspect. At this time the suspect has been pronounced deceased."

She added that one of the two police officers rammed by the vehicle died from his injuries.