CALABASAS  (AP) — AuthoritieWs say a 1,000-pound sign fell on a worker at a Southern California gas station, leaving him with serious leg injuries.

City News Service says it happened shortly before 11 a.m. Friday at a Mobil station in Calabasas.

Los Angeles County fire Inspector Keith Mora says the worker was trapped for about 20 minutes before he was freed.

It’s unclear why the sign fell.