The US Capitol Police has identified the officer who was killed in the attack this afternoon as William “Billy” Evans.

“It is with profound sadness that I share the news of the passing of Officer William ‘Billy’ Evans this afternoon from injuries he sustained following an attack at the North Barricade by a lone assailant,” USCP acting chief Yogananda Pittman said in a statement.

One US Capitol Police officer has died and another is injured after a suspect rammed a vehicle into a police barricade outside the Capitol building Friday afternoon, the department's acting chief Yogananda Pittman told reporters during a press briefing roughly two hours after initial reports of the attack first surfaced.

The officer was identified by Pittman later Friday as Officer William "Billy" Evans, an 18-year veteran of the force and a member of its "First Responders Unit."



"It is with profound sadness that I share the news of the passing of Officer William 'Billy' Evans this afternoon from injuries he sustained following an attack at the North Barricade by a lone assailant," she said in a statement shortly after telling reporters the name of the officer would not be released until his family was notified.



During the press briefing, Pittman said the suspect in the attack, who brandished a knife after ramming his vehicle into a police barricade on Constitution Avenue and was subsequently shot by officers, had also died.

Federal and local law enforcement sources told CNN that the suspect has been identified as Noah Green. One federal source told CNN he was 25 years old.



An investigation into the attack is ongoing, Pittman said, but the immediate danger appears to have subsided. USCP lifted an hours-long lockdown of the Capitol Friday afternoon after law enforcement determined the "external security threat" had been cleared.