WASHINGTON — A U.S. Capitol Police officer and an Indiana man are both dead following a vehicle ramming attack at the Capitol complex.
According to Acting Capitol Police Chief Yogananda Pittman, around 1 p.m. a vehicle slammed into two officers at a checkpoint on Constitution Avenue on the Northside of the Capitol complex near the Russell Senate Office Building.
Pittman said the driver “exited the vehicle with a knife in hand” and lunged toward police. At least one of the officers then opened fire, fatally wounding the suspect.
Both officers and the suspect were transported to a hospital, where, according to Pittman, one of those officers died.
Below is the knife that 25-year-old Noah Green is accused of brandishing after he struck two U.S. Capitol police officers with his vehicle, killing one of them.
Green rammed the car into a barrier on the U.S. Capitol grounds, got out of the vehicle and lunged toward another officer with this knife -- before that officer shot and killed Green.
The department identified the slain officer Friday afternoon as Officer William "Billy" Evans, an 18-year veteran of the Capitol Police Department and a member of the first responder division.
"It is with a very heavy heart that I announce one of our officers has succumbed to his injuries,” Pittman said. “This has been a very difficult time for the Capitol Police department. I ask that you keep our U.S. Capitol Police family in your prayers.”
Capitol Police Union Chairman Gus Papathanasiou said Evans’ death was “a tragic situation that adds to a very difficult year for our membership.”
Shortly after Pittman confirmed the death of the Capitol Police officer, Speaker of the House Nancy Pelosi ordered flags at the Capitol flown at half-staff in his honor.
Law enforcement sources identified the driver of the vehicle to CBS News as Noah R. Green, 25, of Indiana. Green was said to have recent ties to Virginia. According to a U.S. official involved in the investigation, everything is "coming back negative" on Green across all law enforcement databases, and investigators have not yet found any obvious ties to extremist groups.
Congressional staffers were notified about the incident shortly after 1 p.m. when the Capitol Police alert system issued a warning about an "external threat" to the complex. Staffers were warned to stay away from exterior windows and doors.
PHOTOS: Car rams into police at US Capitol barricade; officer killed
By 2 p.m., an immediate reaction force of National Guard soldiers and airmen had been mobilized to secure the Capitol complex, which remained on lockdown. The Guard told WUSA9 no soldiers were injured during the incident at the Capitol.
According to Aaron Fristchner, a staffer for Virginia Rep. Don Beyer, the last time Congressional staff had received a lockdown alert from Capitol Police was on January 6 during the Capitol riot.
Beyer tweeted that it was "shocking and horrifying" to see the Capitol complex attacked again, and Maryland representatives David Trone and Dutch Ruppersberger offered their prayers for the injured officers.
According to Congressional staffers who spoke with WUSA9, many employees who would normally be at the Capitol were working remotely because of Good Friday and the Easter holiday weekend.
U.S. Capitol Police posted a tweet Saturday thanking everyone for their support following Friday's attack.
This is a developing story and will be updated with more information as soon as it becomes available.