Two planes collided head-on in mid-air in Southern California, leaving the pilot of one of the aircrafts dead and three passengers in the other plane alive but badly shaken.

One of the two planes crashed into a ride of a California mountain range in Calabasas. The plane burst into flames on impact, causing a small wildfire. Firefighters responded to reports of that wildfire on Monday afternoon, when they spotted debris from the crashed plane. A search began for survivors of the crash and according to reports the body of the pilot, the only passenger on board, was found several hours later.

After the collision, the second plane allegedly hit a tree at the Westlake Golf Course, located between Los Angeles and Santa Barbara and then landed safely on the fairway. The passengers in this plane sustained minor injuries but survived the crash. No golfers playing on the course at the time were injured as a result of the crash.

The plane that crashed into the mountains, a single-engine Cessna 172, had left Santa Monica Airport for a test flight, according to reports. It was coming from the east when it collided with the second plane, also a Cessna 172 that had been flying west.

According to a spokesperson from the Federal Aviation Administration (FAA), radar reports show the two aircrafts crossed flight paths at approximately 2:00pm on Monday.

Both the FAA and the National Transportation Safety Board are conducting ongoing investigations into the collision.