NEW YORK (AP) - 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.
Her family said Wednesday that Rivers has been moved from intensive care at Mount Sinai Hospital into a private room, where she was "being kept comfortable."
No further details were released on her condition.
E! network says Joan Rivers' weekly "Fashion Police" series is on hiatus.
Melissa Rivers said in a statement Thursday that her mother was resting comfortably. She did not elaborate on the 81-year-old comedian's condition. She offered thanks for an outpouring of "love and support" and asked for continuing thoughts and prayers.
The Mount Sinai Hospital said it had no updates on Friday morning. On Thursday, hospital spokesman Sid Dinsay (DIHN'-say) confirmed that Rivers had been taken there in the morning.
The entertainer has logged a half-century in show business and is known for often-snarky red carpet commentary.
A show she had scheduled Friday at the Count Basie Theatre in Red Bank, New Jersey, has been postponed.
The comedian's condition wasn't immediately known.
The officials spoke on the condition of anonymity because they weren't authorized to publicly name the person transported to Mount Sinai Hospital just after 9:30 a.m. Thursday.
Fire and police officials say they responded to a call of an 81-year-old woman having a heart attack at an upper East Side doctor's office.
A hospital spokesman declined to comment.
Rivers' representatives didn't immediately respond to requests for comment.
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Copyright 2014 by The Associated Press. All Rights Reserved.