Cast member Harrison Ford poses at the premiere of "Ender's Game" at the TCL Chinese theatre in Hollywood, California in this October 28, 2013 file photo. [Photo/Agencies]

Paramedics "initiated spinal mobilization, started an IV and began all the necessary medical protocols that we do," Butler said.

Ford's publicist could not immediately be reached for comment.

Ford, best known as archaeological adventurer Indiana Jones in "Raiders of the Lost Ark" and as the space hero Hans Solo in the "Star Wars" series, is a longtime aviation enthusiast.

Carlos Lugo, 63, said he was playing golf at the Penmar Golf Course when he saw a plane that he believed had taken off from nearby Santa Monica Airport lose power and turn around in an apparent attempt to return to the runway.

"When he flew over us we knew it was too late to make it back to the airport," Lugo said.

The plane went through some trees and landed belly-up near the eighth hole at the golf course, he said.

Reuters images from the scene showed the badly damaged silver and yellow plane crumpled on the golf course grass.

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