A man set himself on fire on Sunday afternoon outside the Israeli Embassy in Washington, according to the Metropolitan Police Department. A U.S. Air Force spokeswoman, Ann Stefanek, confirmed on Sunday night that the man was an active-duty airman.

Officers with the U.S. Secret Service extinguished the fire outside the embassy, in northwestern Washington, around 1 p.m., said Vito Maggiolo, a spokesman with the city’s fire department. The man was taken to a nearby hospital with life-threatening injuries and remains in critical condition.

No embassy staff members were injured, and all were accounted for, according to Tal Naim, a spokeswoman for the embassy.

The man appeared to have filmed the protest and livestreamed it on the social media platform Twitch at the time that the police said they responded to the incident. The New York Times could not confirm who was behind the account that posted the video, but the video featured a man walking toward the Israeli Embassy in Washington.

“I will no longer be complicit in genocide,” a man said in the video, echoing language that opponents of Israel’s military action in Gaza have used to describe the campaign. “I am about to engage in an extreme act of protest.”

Standing in front of the embassy gates, he set his phone down to film dousing himself in a clear liquid from a metal bottle. He then lit himself on fire while yelling “Free Palestine!” until he fell to the ground.