Joan Rivers' case prompts state medical investigation

May 27, 2014 photo of Joan Rivers attending Michigan Avenue Magazine Celebrates Its Women Of Influence, May/June Issue With Joan Rivers at Neiman Marcus Chicago. Jeff Schear/Getty Images for Michigan Avenue Magazine

UPDATE: Joan Rivers has died at the age of 81.

The New York state health department is investigating the circumstances surrounding Joan Rivers' cardiac arrest during an outpatient procedure.

Spokesman James O'Hare said Thursday that the department is looking into "the whole matter." He declined to discuss specifics.

The 81-year-old comic and red carpet commentator was hospitalized last week after going into cardiac arrest at a doctor's office while undergoing a procedure on her throat.

Her family said Wednesday that Rivers has been moved from intensive care at Mount Sinai Hospital into a private room.

In a statement, daughter Melissa Rivers said her mother was "being kept comfortable."

On Tuesday, Rivers' daughter had confirmed the comedian was on life support.

No further details were released on her condition.

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