A motorist rammed a car into U.S. Capitol police on Friday and brandished a knife, killing one officer and injuring another and forcing the Capitol complex to lock down in an attack that police said did not appear to be terrorism-related.

Police shot and killed the suspect.

Yogananda Pittman, acting chief of the U.S. Capitol Police, said the suspect drove into the officers, then hit a barricade and got out of the vehicle, lunging at them with a knife.