MIDDLETOWN — Police have arrested two teenagers on felony arson charges after two parked school buses were set ablaze late Sunday afternoon. One of the buses was heavily damaged. Bradley Petersen, 18, of 2345 West Main Rd., Portsmouth, was released on $2,500 personal recognizance by a bail commissioner, and a 17-year-old Middletown boy, whose name was not released because of his age, was released to his parents.

The fire occurred just before 5 p.m. at the Gaudet Middle School, on Aquidneck Avenue, where the Laidlaw Transit Co. parks its Middletown buses. Witnesses spotted the flames, drove into the parking lot, and saw two males flee in a vehicle as the fire engines began to arrive.

Police tracked the registration to the Portsmouth address, where they found Petersen. That led to the arrest of the Middletown youth as well, police said.