OCEAN CITY, Md. -- Fire marshals are still trying to figure out what sparked a blaze at an Ocean City restaurant. This is what's left of Marco Polo's Pizzeria on 12th street, after smoke and flames tore through the kitchen ceiling late Sunday night. Officials don't yet know the cause, but say it does not appear to be suspicious. There were people working at the time, but no one was injured. The building is severely damaged, and is closed until further notice.