A man walked into the U.S. Capitol Visitors Center and was shot by police after pointing what appeared to be a gun at them, Reuters reported Monday night.
The suspect and a female bystander were taken to the hospital after suffering wounds, police said.
Capitol Police Chief Matthew Verderosa told reporters no police officers were injured but it was unclear how many officers fired gunshots. A weapon was recovered at the scene and the suspect's vehicle was found on location.
A U.S. government official said that initial reports were that a suspect walked into the Visitors Center, pointed a gun at one of the police officers on duty and a shootout erupted.
Verderosa reportedly said the man was known to Capitol police.
The official said no evidence had materialized of a connection to terrorism.
The Washington Post reported that law enforcement officials have not conclusively verified the suspect's name but believe him to be Larry Dawson, 66, from Tennessee.
Congress is in recess, with few lawmakers in Washington, but the shooting happened just a few hours after a drill for an active shooter took place at the Capitol, creating further confusion.
The Secret Service temporarily cleared tourists from an area surrounding the White House after the incident, but activities quickly went back to normal. Capitol Hill was placed in lockdown immediately after the shooting, but was later lifted.
Cathryn Leff, a licensed therapist, tweeted that she was at the visitor's center when she heard gunshots while going through a security check point.
"That moment when it goes down . Everyone is screaming & running and you can't see where the #ShotsFired are from,” tweeted Leff(@Cathrynlefflmft).