OROVILLE, Calif. -

Rescuers in Butte County were busy overnight trying to get to a man who fell under the Bidwell Bar Bridge over Lake Oroville.

The call came in around 1:30 a.m. Tuesday.  CAL FIRE said a man was climbing on rocks under the bridge when he fell 15-20 feet.  He suffered head injuries in the fall.

Rescuers had a hard time reaching his location in the dark.  Butte County Search and Rescue was called in to assist with the technical rescue and hoist the man off the rocks to Oro Quincy Highway.  Finally around 5 a.m., crews were able to get the man to a medical helicopter for transport to Enloe Medical Center in Chico.

The man's name and age were not released.