Actress and comedian Joan Rivers has been rushed to hospital after she stopped breathing during throat surgery, NBC News reports.
The 81-year-old is said to be in "a critical condition" in Mount Sinai hospital in New York.
She stopped breathing during a procedure at Yorkville Endoscopy, sources told NBC.
Rivers found fame in 1968 when she appeared on The Tonight Show starring Johnny Carson.
She has gone on to become an award-winning talk show host, actress and author.
Here are 10 of the sharpest one-liners from Joan Rivers, who has died aged 81.
Stars have paid tribute to comedian Joan Rivers as fans lay flowers on her Walk of Fame star and comedy venues show their respect.
A pioneer in the world of comedy, Joan Rivers carved a career with her tenacity and an acid tongue that spared no-one - including herself.