TULSA, Oklahoma - Investigators are trying to figure out what started a fire in a vacant Tulsa house just before midnight Monday.

The home is located east of I-244 in the 2800 block of West 45th Street.

Firefighters got the call at 11:45 p.m. and say there is a lot of damage to the back of the home.

They say no one was found inside and no one was hurt in the fire.