High winds may be to blame for a late night building collapse in the Woodlawn neighborhood.

No one was injured when a vacant house collapsed Saturday night in the Grand Crossing neighborhood on the South Side, authorities said.

The two-and-a-half story building collapsed about 11 p.m. in the 6300 block of South Evans Avenue, Deputy Fire Cmsr. John McNicholas said.

By interviewing neighbors and using body-sensing technology, firefighters determined the home had been unoccupied when it collapsed, McNicholas said. Firefighters searched the rubble as a precaution and found no one.

The building showed signs of renovations, McNicholas said, but officials are still working to determine what triggered the collapse.

asege@tribune.com

Twitter: @AdamSege