Firefighters have found the body of a man inside a blazing building on the north side of downtown Omaha.

Authorities say the fire started a little before 4:30 a.m. Tuesday. Arson investigators are looking for clues in the rubble of the abandoned building, which had housed a bar.

It took firefighters about an hour to control the flames.

It’s unclear whether the man died as a result of the fire. His name hasn’t been released.