Doctors in the US are said to have placed Joan Rivers in a medically induced coma which they expect to bring her out of at the weekend.
The hospital released a brief statement confirming Rivers was at the facility.
“Her family wants to thank everybody for their outpouring of love and support,” said hospital spokesman Sid Dinsay.
“We will provide an update on her condition as it becomes available.”
Another family source however said the situation was still critical.
Earlier on, it was reported that the 81-year-old comedian was rushed to hospital after she had stopped breathing during a reported throat procedure at a clinic in New York.
A spokesman for the NYPD said earlier today that the emergency call was made at 9.39am local time from an address in East 93rd Street, Yorkville, where there is an outpatient centre which describes its mission as to “serve as a community resource for digestive disorders”.
Since 2010 she has co-hosted E! show Fashion Police alongside Guiliana Rancic and Kelly Osbourne.
She also currently hosts an online weekly talk show called In Bed With Joan.