Crews are tackling a one-alarm fire at a vacant building on Treasure Island this afternoon, a San Francisco fire spokeswoman said.

The fire at the building at 810 Avenue E was reported at 4:01 p.m., fire spokeswoman Mindy Talmadge said.

She said the fire was first reported on the stairs of the building and may have spread.

As of 4:20 p.m., she said firefighters had moved onto the roof of the empty building.

Sasha Lekach, Bay City News

Please make sure your comment adheres to our comment policy. If it doesn't, it may be deleted. Repeat violations may cause us to revoke your commenting privileges. No one wants that!