US Air Force F-16 Arizona Crash Update: Military Investigating Cause, Condition Of Pilot

A U.S. Air Force F-16 Fighting Falcon jet crashed over northwestern Arizona on Thursday morning. The condition of the pilot was not immediately known.

A preliminary investigation has already been set up to find out what happened to the jet, which took off earlier that morning from 56th Fighter Wing at Luke Air Force Base.

"Luke AFB officials are working closely with local authorities in a search and rescue operation," Luke said in a news release Thursday afternoon. "Due to the remote location and rugged terrain, the status of the pilot is unknown."