Joan Rivers is reportedly in a medically-induced coma as doctors continue to monitor her condition.

Sources tell the "New York Daily News," doctors expect to bring the 81-year-old comedienne out of the coma this weekend to evaluate any damage she may have suffered.

Rivers reportedly stopped breathing during a procedure on her throat at a New York clinic Thursday morning. Authorities say she was in cardiac and respiratory arrest when they took her to Mount Sinai Hospital. A statement released from the hospital Thursday said it would provide an update on Rivers' condition as soon as it becomes available.

Rivers' daughter and frequent red carpet co-host Melissa Rivers has reportedly flown across the country from California to New York to be at her mother's side. (Metro Networks Inc.)