Capitol Police arrested a man with a gun and ammunition in his vehicle near the Capitol Thursday morning.

Robert Wesley Combs, 23, of Monroe, Georgia, has been charged with having an unregistered firearm and unregistered ammunition, Capitol Police said.

Officers first saw what appeared to be a firearm in a parked car in the 300 block of New Jersey Avenue NW during “routine parking enforcement” at 9 a.m. Combs arrived on the scene after an investigation had been started by Capitol Police and he consented to a search of the vehicle. Officers recovered a weapon, ammunition and other items, Capitol Police spokeswoman Eva Malecki said.

Combs was arrested and brought to Capitol Police headquarters for processing. He has also been charged with transporting a firearm across state lines and additional charges are pending, according to Malecki. There is no evidence that the incident is tied to terrorism, she said.

A few hours after the arrest, the Secret Service closed access to the fence on the north side of the White House because of a suspicious vehicle at a nearby checkpoint. There is no indication that the two incidents are linked.