Officials in Ocean City are investigating a late night fire that damaged the Marco Polo Pizzeria on Coastal Highway. Ocean City firefighters were called to the restaurant about 10:30 p.m. Sunday. The fire engulfed the roof of the building, and it took firefighters nearly two hours to extinguish the blaze. The cause of the fire has not been determined. But the fire marshal told the restaurant's owner it may have been an electrical-related fire.