FRESNO, Calif. (KFSN) -- An arson investigator is looking into what caused an apartment fire in Central Fresno.
It was first reported just before 4 a.m. Thursday on U Street and Illinois Avenue.
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Crews arrived to find a glow from flames in an upstairs apartment.
They say there was fire and a hole in the floor.
The fire did not spread to the downstairs or other units.
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The building is currently unoccupied and under construction.
There are no utilities and boards were covering the windows and doors.