A Mercedes reported stolen by troubled actor Charlie Sheen was found crashed down a cliff near his Los Angeles home.
Police 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 at around 4am yesterday 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 upside-down in the bushy ravine. They searched the area on foot and with an infra-red equipped helicopter but found nobody in or around the car, Officer Bruce Borihanh said. It 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."
Several hours after Sheen's car was discovered, the Bentley was found off the cliff a few roads away by a photographer.
Police spokesman Richard French said three other cars were reportedly broken into overnight in the same area.
Sheen, the star of 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.
A police officer's arrest affidavit quoted his wife Brooke as saying the actor pinned her on a bed while holding a knife to her throat.
Sheen denies threatening his wife and the couple reportedly want to reconcile.