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By Us Weekly

Joan Rivers was taken to a hospital on Thursday, Aug. 28, after experiencing complications during throat surgery at a New York City clinic, TMZ reports.

UPDATE: E! News correspondent Ken Baker tweeted that Rivers is now stable. "Our own lovely living legend Joan Rivers is in stable condition at Mt Sinai hospital," he wrote just after 12:30 p.m. ET.

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Per TMZ, the "Fashion Police" host, 81, stopped breathing while undergoing a procedure on her vocal cords. She was reportedly rushed to Mount Sinai hospital in Manhattan for further treatment.

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TMZ claims that a 911 call was placed just after 9:30 a.m. ET, during which the caller said they had somebody "in either cardiac or respiratory arrest."

This story is developing.