A suspect was arrested after a car crashed into a post office in San Jose, California, early Sunday, causing the building to go up in flames, authorities said.

Richard Tillman, 44, of San Jose, was arrested after his car crashed into a U.S. Post Office near Almaden Country Club at 2:30 a.m. Sunday, police and fire officials said.

“Postal inspectors are investigating the incident as a potentially intentional act,” USPIS said.