Source of gas smell at Main and Jackson a mystery so far this morning

City fire officials and National Fuel and National Grid workers are trying to unravel a mystery this morning -- what's the source of a gasoline smell emanating from the ground behind the old Genesee Bank building.

A business owner on Main Street reported the gas odor this morning. It was filling the air in that business and in the basement of 90 Main St., but not the surrounding building basements.

Meters have also detected the substance around where a new utility pole was installed last week.

One possible explanation is that decades ago -- before there would have been permits required -- there was a fuel tank in the area. The odor could be coming from residue of an old tank. But that's just speculation at this point.

UPDATE: It turns out a maintenance worker had spilled a small amount of gasoline in the area  a day or two before and that caused the odor to build up in the building.