A U.S. Capitol Police officer died Thursday night after suffering injuries during Wednesday’s rioting in Washington, police confirmed in a statement.

The officer was identified as Brian Sicknick, a member of the department’s First Responder’s Unit who joined the force in July 2008.

Sicknick’s death will be investigated as a homicide, the Capitol Police said, with the probe handled by Capitol Police, Washington’s Metropolitan Police, and federal agencies.

Sicknick was on duty at the Capitol when he was injured “while physically engaging with protesters,” the statement said. The officer collapsed after the attack and was taken to a local hospital, where he died at 9:30 p.m. Thursday.

A police motorcade was captured on social media Thursday night escorting Sicknick on Constitution Avenue in Washington. Officers were seen lining the front of the Capitol in silence in honor of the officer, reports said.

A police motorcade escorts United States Capitol Police Officer Brian D. Sicknick Thursday night on Constitution Ave NW & 15th St NW. pic.twitter.com/5kLJI5F8RF

— Allison Papson (@AllisonPapson) January 8, 2021

Brian Sicknick was a Trump-supporting U.S. Capitol Police officer and military veteran who has died of injuries suffered during a pro-Trump riot on January 6, 2021, at the Capitol building, authorities say. Sicknick was injured while “physically engaging” with rioters, the U.S. Capitol Police Department said in a statement. He died at 9:30 p.m. on January 7, the department said.

The officer’s death was first reported by Nexstar Media Group reporter Alexandra Limon and The New York Times. The circumstances surrounding his death remain unclear. Nexstar Media Group, which owns several local news stations, reported he was struck in the head with a fire extinguisher and suffered a stroke. Sicknick, 42, was a New Jersey native.

“Officer Brian D. Sicknick was injured while engaging with protesters Wednesday and returned to his division office, where he collapsed,” NBC News reported.

After reports of the officer’s death circulated, Daily Beast reported that he had not died but that he was on a ventilator with a blood clot on the brain and “it did not look good.” According to Limon, he was kept on life support until his family could come to see him. However, then he did die.

The officer was struck in the head “by a rioter,” according to WGN. The name of the suspect, or their political affiliation, was not immediately clear. It was the second death to stem from the Capitol riots; a San Diego Trump supporter named Ashli Babbitt was shot and killed by a different Capitol Police officer while coming through a window into a lobby area where members of Congress sheltered after fleeing as the mob came into the Capitol. Three other people died of medical incidents.

Ashli Babbitt 14 Year US Airforce Veteran Shot and Killed in Capitol After Trump Rally in DC