San Antonio arson investigators are looking into the cause of a fire that damaged an East Side bar early Thursday morning.

Flames broke out just before 2:30 a.m. at La Potranca Bar in the 500 block of Sherman Street.

Firefighters extinguished the flames quickly and found two points of origin for the fire, the front door and the roof.

Fire officials said a gas can was found at the scene and the bar was closed at the time.

No injuries were reported. The fire caused an estimated $2,000 in damages, fire officials said.