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UPDATE - Mount Sinai spokesperson Sid Dinsay released a statement regarding Joan Rivers' hospitalization:

 "This morning, Joan Rivers was taken to The Mount Sinai Hospital in New York, where she is being attended to. Her family wants to thank everybody for their outpouring of love and support. We will provide an update on her condition as it becomes available."


(TMZ) - 8:49 AM PT - The NYPD tells TMZ ... Joan is currently in critical condition. 

TMZ reports that at one point, Joan's heart stopped beating. 

It's unclear if doctors were able to restart the comic's heart. 

8:15 AM PT -- TMZ reports an emergency call was placed to 911 at 9:39 AM ET and the caller said, "We have somebody in either cardiac or respiratory arrest."


Joan Rivers was rushed to a hospital in New York City moments ago ... after she stopped breathing during a surgery on her throat ... TMZ has learned. 

TMZ reports Rivers was undergoing the throat procedure in a clinic (specifically on her vocal chords) ... when she stopped breathing during the surgery. 

Sources tell TMZ 81-year-old Rivers was rushed to Mount Sinai hospital in New York. 

According to TMZ, her daughter Melissa is on her way to New York. 

Story developing ...

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