TIBURON, Calif. -

Marin County Sheriff's Department reports that actor Robin Williams was found dead at his home in Tiburon, CA just before noon on Monday.

Robin's wife say him the night before at about 10:30 pm and then left the next morning assuming Mr. Williams was still asleep.  About an hour later Robin's personal assistant became concerned and checked in on him in his bedroom.

The assistant found Robin Williams hanging by a belt with cuts to his wrist.

Deputies responded to a 9-1-1 call reporting that Robins was unconscious and not breathing.  Robin Williams was pronounced dead at his home just after noon.

Marin County Coroner's Office reports indicate probable suicide but the investigation will not be complete until toxicology reports come back in two to six weeks.

"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."