WASHINGTON (AP) — A man drove his car into a barricade near the U.S. Capitol early Sunday and then began firing gunshots in the air before fatally shooting himself, police said.

The incident happened just before 4 a.m. at a vehicle barricade set at East Capitol Street NE and 2nd Street SE in Washington.

It comes at a time when law enforcement authorities across the country are facing an increasing number of threats and federal officials have warned about the potential of violent attacks on government buildings in the days since the FBI’s search of former President Donald Trump’s Mar-a-Lago estate in Florida.

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The attack is reminiscent of an incident when a man drove a vehicle into two Capitol Police officers at a checkpoint in April 2021, killing an 18-year veteran of the force. And many on Capitol Hill remain on edge after supporters of the then-president stormed the Capitol on Jan. 6, 2021.

Authorities said the man, whose identity has not been released, crashed into the barricade and that as he was getting out of the car, the vehicle became engulfed in flames. The man then opened fire, firing several shots into the air as police approached.

Capitol Police said the man shot himself as the officers neared. He was later pronounced dead.

Police said “it does not appear the man was targeting any member of Congress” and that investigators are examining the man’s background as they work to try to discern a motive. Both the House and Senate are in recess and very few staff members work in the Capitol complex at that hour.

Investigators have located addresses for the man in Pennsylvania and Delaware and have learned he had a criminal history in the past decade.

Authorities said no other injuries were reported and police do not believe any officers returned fire.