A Mercedes reported stolen by troubled actor Charlie Sheen was found crashed down a cliff near his Los Angeles home, police said.
They said there was no evidence anyone was in the car when it went into the ravine.
A Bentley was later found off the same road nearby and three other cars were reportedly broken into in the same area. Police were investigating if the incidents were linked.
Police got an emergency call from an alert system that calls emergency services when there is a problem with the vehicle that may require assistance, officer Wendy Reyes said.
At about the same time, Sheen, 44, called police to say his four-door Mercedes-Benz had been stolen from his Sherman Oaks home.
Police and firefighters found the car 300-400ft down a cliff, upside-down in the brushy ravine. They searched the area on foot and with an infrared-equipped helicopter but found nobody in or around the car, officer Bruce Borihanh said.
The car was later hauled back up the hillside and will probably be impounded while the investigation continues.
Sheen's publicist Stan Rosenfield said: "Charlie is fine, and the police are investigating."
Sheen, the star of CBS comedy Two And A Half Men, will appear in court on Monday on domestic violence charges after a Christmas Day disturbance at his home in Aspen, Colorado.
Sheen denies threatening his wife and the couple are seeking to modify a court order that prevents them from communicating with each other. She has said they love each other and want to reconcile.