(Reuters) -A protester with a Palestinian flag self-immolated on Friday outside the Israeli consulate in Atlanta, authorities said.

The person, whom officials did not identify, is in critical condition, Police Chief Darin Schierbaum said at a news conference. A security guard who attempted to intervene was also injured.

"We believe this building remains safe, and we do not see any threat here," the chief said. "We believe that was an act of extreme political protest."

The protester arrived around 12:17 p.m. at the office building, which houses the consulate as well as several businesses, and used gasoline, police said.

"We are saddened to learn of the self-immolation at the entrance to the office building," the consul general of Israel to the southeastern U.S., Anat Sultan-Dadon, told ABC News. "It is tragic to see the hate and incitement toward Israel expressed in such a horrific way. The sanctity of life is our highest value."

Israel resumed its military offensive in Gaza on Friday after talks to extend a week-long truce collapsed.

Israel has vowed to annihilate Hamas after the militant group attacked southern Israel on Oct. 7, killing 1,200 people and taking 240 hostages, according to Israeli tallies.

More than 15,000 Gazans have been killed during Israel's assault, Palestinian officials say, which has destroyed much of the enclave.

The conflict has prompted hundreds of protests and rallies across the U.S., both in support of Palestinians as well as Israel.

(Reporting by Joseph Ax; Additional reporting by Kanishka Singh, Jonathan Allen and Matt Spetalnick; Editing by Daniel Wallis and Bill Berkrot)