A contractor was injured at Bowie High School in South Austin after an air conditioning unit he was repairing shifted from the ceiling and pinned him Monday afternoon, authorities said.

"The unit slipped from the ceiling and fell behind the worker who was on the ladder, trapping him between the ladder and the wall," Bowie High Principal Mark Robinson said in an email to parents. "We immediately contacted the Austin Fire Department and (EMS), who were able to move the unit."

First-responders got the call around 2:45 p.m. The man was taken to St. David's South Austin Medical Center with injuries not expected to be life-threatening, Austin-Travis County EMS reported.

Multiple assets responding to 4100blk W Slaughter Ln (14:45) Rescue condition. Reports of an AC unit on the roof that has fallen onto a person trapping them. More information to follow.

— ATCEMS (@ATCEMS)February 11, 2019