US actor Robin Williams has been found dead, aged 63, in an apparent suicide, California police say.
Marin County Police said they had found Williams unresponsive after responding to an emergency call around noon local time.
Williams was famous for films such as Good Morning Vietnam and Dead Poet's Society.
He had been open in the past about his struggles with alcohol and drugs.
He had recently returned to a rehabilitation centre to "fine-tune" his sobriety, the Los Angeles Times reported in July.
"At this time, the Sheriff's Office Coroner Division suspects the death to be a suicide due to asphyxia, but a comprehensive investigation must be completed before a final determination is made," police said in a statement.
