The suspect accused of opening fire at the White House Correspondents’ Dinner has been charged with attempting to assassinate U.S. President Donald Trump.

Axar.az reports, citing CBS, Cole Allen made his first appearance in federal court but did not enter a plea.

He also faces additional firearms-related charges, authorities announced during a press briefing involving Acting Attorney General Todd Blanche, FBI Director Kash Patel, and U.S. Attorney Jeanine Pirro.

According to an FBI affidavit, Allen traveled by train from Los Angeles to Washington and checked into the Washington Hilton a day before the event. He was armed with a shotgun and handgun when he allegedly stormed a security checkpoint and opened fire. A Secret Service agent was struck but protected by a bulletproof vest.

The incident has raised concerns about security at the high-profile event, which drew thousands of journalists, officials and public figures. The Secret Service said it will review and strengthen security measures for future events as investigations continue.