"Robin Williams was an airman, a doctor, a genie, a nanny, a president, a professor, a bangarang Peter Pan, and everything in between. But he was one of a kind. He arrived in our lives as an alien -- but he ended up touching every element of the human spirit. He made us laugh. He made us cry. He gave his immeasurable talent freely and generously to those who needed it most -- from our troops stationed abroad to the marginalized on our own streets. The Obama family offers our condolences to Robin's family, his friends, and everyone who found their voice and their verse thanks to Robin Williams."

"We were deeply saddened to learn of the death of Robin Williams. Robin was a true artist who brought joy to the world through his brilliance, humor, talent and love for our community. We lost one of our greatest fans today and he will be deeply missed by the Giants family. Our thoughts and prayers are with Robin's family and the entire community during this difficult time."

MARIN COUNTY, Calif. (KGO) -- The Marin County Sheriff's Office says actor Robin Williams was found dead at his home in unincorporated Tiburon on Monday morning. He was 63.Marin County Communications received a 911 call reporting a man had been found unconscious and not breathing inside his home at 11:55 a.m. The Sheriff's Office, as well as the Tiburon Fire Department and Southern Marin Fire Protection District were dispatched to the incident with emergency personnel arriving on scene at 12 p.m.Williams was pronounced dead at 12:02 p.m. An investigation into the cause of death is currently underway by the Investigations and Coroner Divisions of the Sheriff's Office.The Sheriff's Office Coroner Division suspects the death to be suicide due to asphyxia. They are investigating and will conduct a forensic examination to determine the exact cause.A statement from Williams' representative said the comedian had been battling severe depression, adding, "This is a tragic and sudden loss. The family respectfully asks for their privacy as they grieve during this very difficult time."Williams' wife, Susan Schneider, issued a statement saying in part, "This morning, I lost my husband and my best friend, while the world lost one of its most beloved artists and beautiful human beings. I am utterly heartbroken... As he is remembered, it is our hope the focus will not be on Robin's death, but on the countless moments of joy and laughter he gave to millions."By Monday evening, fans were leaving flowers and tokens outside Williams' Marin County home as well as the San Francisco house featured in the 1993 film "Mrs. Doubtfire."Williams first moved to the Bay Area when he was a teen and attended Redwood High School in Larkspur and later the College of Marin for theater. He also owned a home in San Francisco's Sea Cliff neighborhood.He had a long career as a stand-up comedian and appeared in numerous film and television roles including the 1970s sitcom "Mork and Mindy," his Academy Award-winning performance in "Good Will Hunting" and nominations for "Good Morning, Vietnam," "Dead Poets Society" and "The Fisher King."Williams also won three Golden Globes, for "Good Morning, Vietnam," "Mrs. Doubtfire" and "The Fisher King."The White House has released a statement on Williams' passing from President Barack Obama.San Francisco Mayor Ed Lee issued a statement saying in part, "San Francisco mourns the profound loss of Robin Williams who inspired us with his comedy and art. His legacy has had a deep and inspiring impact on our City and on our residents. Despite his success, he has never forgotten San Francisco. He was a philanthropist who gave generously, and he was a friend of the City."Williams was a well-known fan of the San Francisco Giants. Monday evening, Giants President and CEO Larry Baer issued a statement on his passing:Bob Iger, CEO of The Walt Disney Company, issued a statement on the actor's death, saying in part, "An incredible actor and a comedic genius, Robin will always be remembered for bringing some of the world's favorite characters to life, from his zany alien on ABC's Mork & Mindy to the irascible genie in Disney's Aladdin. He was a true Disney Legend, a beloved member of our family, and he will be sorely missed."