Emergency crews responded to a debris field in the ocean and divers searched for victims.
The FAA and U.S. Coast Guard confirmed two planes collided midair and plunged into the ocean below.
Baywatch Redondo said a small fishing boat spotted a plane nose down in the water.
The Los Angeles Fire Department said the incident was reported at about 3:15 p.m.
Baywatch Redondo, the Los Angeles County and Long Beach fire departments, along with the U.S. Coast Guard stated they were responding to the scene.
Stay with abc7news.com for updates on this developing story.