CAMARILLO, Calif. -- A father and his teenage son were killed Sunday afternoon in a small plane crash in Camarillo, CBS Los Angeles reports.

The wreckage was cleared from the scene just before 10 p.m. The crash was under investigation.

A mother and son who witnessed the crash told CBS Los Angeles that the incident has been difficult to take in.

CBS Los Angeles

"It hasn't sunk in and I've been running on adrenaline," said Anne Carter.

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She and her son, Peter Carter, were out Sunday for a ride in their own plane.

While taking a selfie, they said they noticed the other plane flying erratically.

"We kept watching him and he was making a lot of these sharp turns and really low to the ground. banking left, banking right and we were keeping an eye on him," Carter said.

They both saw the single-engine aircraft take a hard turn and come crashing down.

"He just slammed right into the ground. The plane came to a stop. No debris went flying. There was no explosion, no fire," Peter Carter said. "It kinda just stopped right there on the ground."

The plane flipped and folded in half on a horse arena.

Deputies identified the two on board as a 57-year-old father and his 15-year-old son.

Both the pilot and passenger were killed. It is believed they were both from Camarillo.

On Thursday, there was another deadly plane crash in this same county. In that crash, one person was killed when their Cessna went down in the hills above the Ventura County coastline.

Almost two miles away, officials pulled what appeared to be aircraft debris off the beach. Witnesses reported seeing a mid-air collision but officials never found wreckage from any other aircraft.