SAN RAFAEL, Calif. (AP) — Sheriff’s officials near San Francisco say Robin Williams committed suicide by hanging himself with a belt at his home.

A sheriff’s lieutenant says Williams’ personal assistant found the actor yesterday in a bedroom at Williams’ home. Williams also had superficial cuts on his wrist, and a pocketknife was found nearby.

According to Sheriff’s Lt. Keith Boyd, Williams had been seeking treatment for depression. Boyd isn’t saying whether Williams left a suicide note.

The actor’s wife had last seen him the night before, and had left the home that morning thinking he was still asleep. Williams’ personal assistant later came to the home and became concerned when he knocked on the door and got no response.

It will take weeks to get the results of toxicology tests on whether Williams had any drugs or alcohol in his system.

Fans and friends have been leaving bouquets, candles and personal notes in front of the locked gates of the home. Neighbors say he had lived in the quiet, waterfront neighborhood for eight years, and that he was friendly and approachable.