A man who was “acting suspiciously” at the Pentagon on Monday was arrested after trying to run from police, according to Pentagon spokeswoman Sue Gough.

A Pentagon police officer first approached the man around 10:45 a.m. in the building’s northern parking lot, Gough said in a brief statement. She did not specify what the man was doing that caught the police officer’s attention.

The man bolted across Route 27 and into Arlington National Cemetery, Gough said. He was arrested at about 1 p.m. and is being questioned by Pentagon police in coordination with the FBI.

No further information was immediately available.

“The Pentagon police have examined the area and vehicles where the suspicious activity was observed, and have determined that the area is now safe,” Gough said.

In August, a man who approached a Pentagon police officer was arrested after admitting that he had a firearm in his truck. A subsequent search revealed the man had a loaded 12-gauge shotgun, machete, two pocket knives, marijuana, and alcohol. The man agreed to commit himself for a psychiatric evaluation.