Comedian Joan Rivers died from low blood oxygen during a routine medical procedure to check out voice changes and reflux, the New York City medical examiner's office has ruled.
The 81-year-old died on Septemebr 4 after suffering brain damage during a procedure to examine her gastrointestinal tract and vocal folds.
Rivers had been sedated during the procedure with the anaesthetic propofol, the medical examiner said.
Her daughter Melissa declined to comment on the findings, saying in a statement: "We continue to be saddened by our tragic loss and grateful for the enormous outpouring of love and support from around the world."
Comedian Joan Rivers seemed to promote the new iPhone 6 from the grave today after posts appeared on her official Facebook and Instagram accounts, TMZ reported.
The post appeared on Rivers' Facebook and Instagram pages for a brief period this morning before they were removed.
TMZ suggests the posts were the result of a "pre-negotiated deal" with Apple and before her death she had scheduled them to publish on the iPhone's launch day.
The New York Times posted on Twitter after Joan Rivers' funeral:
US television presenter Billy Bush has called the send-off given to Joan Rivers in New York today as the "best funeral ever". He tweeted:
Irreverent to say the least. Best funeral ever. Really. Joan Rivers would have loved it.
The funeral of comedian Joan Rivers has been held in Manhattan, attended by celebrities including Whoopi Goldberg, Sarah Jessica Parker, Kelly Osbourne and her daughter Melissa.
The service opened with the New York City Gay Men's Chorus and closed with the bagpipe band of New York City Police Department, while actor Hugh Jackman was reported to have performed Quiet Please, There's a Lady on Stage from his musical The Boy From Oz.
Rabbi Joshua Davidson led opening prayers: "We mourn with her family, friends and all those millions to whom she brought laughter and joy."
Tributes to the 81-year-old comedian came from Melissa, friend Margie Stern and gossip columnist Cindy Adams.
Kelly Osbourne, who appeared with Joan Rivers on her E! show Fashion Police, has arrived at the comedian's funeral in New York today.
US television station 6abc tweeted this picture of Kelly sporting a mauve mohawk hairstyle:
Dozens of celebrities are attending the funeral of Joan Rivers in New York today. The comedian died aged 81 on Thursday after suffering a heart attack during surgery.
Thousands of fans have gathered outside the Manhattan temple where the funeral of Joan Rivers is being held today.
Celebrities including Rosie O'Donnell, Judge Judy, Kyle MacLachlan and Kelly Osbourne have arrived for the private funeral of the pioneering comedian.
NBC News reporter Ron Mott has tweeted this picture:
Huge crowd of media/spectators outside Temple Emanu-el in New York City for Joan Rivers memorial service. http://t.co/OBTcsYf38j
Mourners including Sarah Jessica Parker and Whoopi Goldberg have gathered in New York for the funeral of comedian Joan Rivers, who died on Thursday aged 81.
Other celebrities including US "shock jock" Howard Stern are attending the ceremony at Temple Emanu-El on Fifth Avenue in Manhattan, while thousands of fans have lined the surrounding streets.
Roger Stern, of New York radio station 1010 WINS, tweeted this picture of the temple.
Comedian Joan Rivers will be laid to rest in a private funeral ceremony later today.
The 81-year-old comedy legend died on September 4, a week after suffering a cardiac arrest during an outpatient operation.
Her invitation-only funeral will be held at Temple Emanu-El, a landmark synagogue on New York's Fifth Avenue where she was a member of the congregation.
Senior Rabbi Joshua M. Davidson, who will conduct the service, said in a statement: "We mourn with her family, friends and all those millions to whom she brought laughter and joy."