UPDATE: 4:25 P.M.
President Joe Biden has ordered that U.S. flags at the White House be lowered to half-staff until April 6 in honor of a U.S. Capitol Police officer who was killed Friday after a man rammed a car into a security checkpoint.
Biden says he and first lady Jill Biden are heartbroken over the death of officer William Evans, an 18-year veteran of the Capitol Police force. A second Capitol police officer was injured in the attack, while the suspect was killed.
Biden says he knows what a difficult time it’s been for the Capitol and all who work there and protect it. Friday’s incident came about three months after the Jan. 6 insurrection that killed a Capitol police officer and four other people.
Biden released the statement from the Camp David president retreat, where he is spending the weekend.
He expressed gratitude to the Capitol Police and the National Guard troops for responding quickly to the attack.
UPDATE: 3:25 P.M.
Capitol Police have identified the officer killed during Friday's incident as Office William "Billy" Evans.

Capitol Officer 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. Officer Evans had been a member of the United States Capitol Police for 18 years. He began his USCP service on March 7, 2003, and was a member of the Capitol Division’s First Responder’s Unit. Please keep Officer Evans and his family in your thoughts and prayers," said Acting U.S. Capitol Police Chief Yogananda Pittman
UPDATE: 1:55 P.M.
U.S. Capitol Police say an officer has died after a suspect rammed his car into two officers and lunged at officers with a knife before being shot.
Acting Chief Yogananda Pittman says the officer died after Friday's incident, but did not immediately provide additional details. The officer's identity was not released.
Pittman says the suspect rammed a barricade near the U.S. Capitol. She says the suspect then exited the vehicle with a knife and lunged at the officers. The suspect was shot and died at the hospital.
UPDATE: 1:50 P.M.
WASHINGTON (AP) -- Chief: 1 Capitol Police officer killed after car rams into law enforcement at security barricade, 2nd officer injured.
DC police chief: No longer an ongoing threat at Capitol, car attack on officers not believed to be related to terrorism.
UPDATE: 1:40 P.M.
WASHINGTON (AP) -- Two law enforcement officials say a man rammed a car into two Capitol Police officers at a barricade outside the U.S. Capitol before being shot to death by authorities when he climbed out of the vehicle while appearing to brandish a knife.
UPDATE: 1:25 P.M.
Law enforcement sources tell ABC News a suspect is dead after an encounter with Capitol Police.
UPDATE: 1:15 P.M.
WASHINGTON (AP) -- Two law enforcement officials say a car rammed into two Capitol Police officers at a barricade outside the U.S. Capitol, and the driver got out of the vehicle while appearing to brandish a knife before being shot by authorities.
Both Capitol Police officers and the driver were taken to the hospital, with at least one officer in serious condition.
UPDATE: 1:05 P.M.
WASHINGTON (AP) -- Officials: Driver who hit officers at Capitol barricade appeared to have knife, was shot by police and critically hurt.
UPDATE: 12:38 P.M.
WASHINGTON (AP) � A car has rammed a barricade outside the U.S. Capitol, injuring two Capitol Police officers and leading to the driver being shot. That's according to two law enforcement officials who spoke to The Associated Press on Friday on condition of anonymity as the event was unfolding.
Capitol Police say the incident happened at a checkpoint near the Capitol. It comes as the Washington region remains on edge months after a mob of armed insurrectionists stormed the U.S. Capitol as Congress was voting to certify Joe Biden’s presidential win.
The Capitol complex was placed on lockdown after the shooting and staff were told they could not enter or exit buildings
ORIGINAL STORY
WASHINGTON (AP) � Police have locked down the U.S. Capitol after a report of gunshots in the area.
U.S. Capitol Police said early Friday afternoon that all Capitol buildings were being locked down “due to an external security threat� and staff members were told they could not enter or exit the buildings.
A law enforcement official says officers were responding to a report of a possible shooting on a street near the Capitol complex.
It wasn’t immediately clear if anyone was injured.
The official could not discuss an ongoing investigation publicly and spoke to The Associated Press on condition of anonymity.