SAN RAFAEL (CBS SF) — The Marin County Sheriff’s Office will hold a press conference at 11 a.m. Tuesday to announce an official investigation into the cause of Robin Williams’ death.

The news conference will be streamed live on CBSSF and KCBS.

READ MORE: Summer Departs With Sweltering Temperatures; Smoky Skies Draped Over East Bay

UPDATE: Preliminary Investigation Shows Robin Williams Died Of ‘Asphyxia Due To Hanging’

Oscar winning actor and comedian Robin Williams was found dead of an apparent suicide in his Tiburon home Monday, according to the Marin County Sheriff’s Office.

Authorities responded to a report of an unconscious man in a residence on Paradise Drive in Tiburon shortly before noon Monday. Deputies found the 63-year old actor unconscious inside the home shortly after arriving. He was pronounced dead at the scene.

READ MORE: Scaled-Down Dreamforce Marks Major Step In San Francisco's COVID Economic Rebound

Officials believed Williams took his own life via some form of asphyxiation.

Williams was last seen alive Sunday evening around 10 p.m. in the home, where he resided with his wife.

COMPLETE COVERAGE:

MORE NEWS: KPIX Original Report: SF Mission Bay Sidewalks Sinking But City Won't Fix 'Private Property'