Keanu Reeves' girlfriend Jennifer Syme has been killed in a car accident.
29-year-old Ms Syme died instantly when her Jeep Cherokee four-wheel drive vehicle hit three parked cars and overturned in Los Angeles.
Ms Syme had been treated for depression after her baby daughter was stillborn in January last year but Los Angeles police say it is not known if drugs or alcohol had been a factor in the crash.
The crash occurred on Sunday at 6.20am local time when Ms Syme, a record industry executive, was driving along Cahuenga Boulevard in Hollywood.
Ms Syme and The Matrix star Reeves, 35, had preserved their privacy and never made their relationship public or commented on the loss of their baby.
Later Los Angeles County Coroners department said they were investigating if drugs had played any part in the crash.
Lieutenant Fred Corral said Ms Syme's mother had told the department her daughter was being treated for both back pain and depression following her baby's death.
"We found some medication which we believe to be prescription drugs the deceased was receiving," said Lt Corral.
"Two one dollar bills which were rolled-up with a white powdery substance were also found inside the vehicle."
Lt Corral said an autopsy had been carried out on Ms Syme's body but further toxicology tests were to be carried out to determine the cause of death.