Investigators in Irondequoit say it appears a fire that damaged a barn at the town Public Works complex started in a truck inside the barn.
Three trucks and the roof were damaged by the fire, but no one was hurt.
The fire was put out in about 20 minutes.
The Public Works complex is on East Ridge Road.
The fire was not in the main building, which was built after a fire destroyed the old Public Works building on Kings Highway seven years ago.