*Melissa Rivers was described by the New York Daily News as “an emotional wreck” Friday while awaiting a medical update on the condition of her mother, Joan Rivers.

The 81-year-old comedian was rushed to Mount Sinai Hospital in New York Thursday and placed in a medically induced coma after going into cardiac and respiratory arrest during a procedure on her throat at a nearby clinic.

Melissa, her mother’s only child, flew in Thursday from California with her son Cooper. They reached the hospital around 8 p.m. After visiting her unconscious mother, she issued a statement thanking “everyone for the overwhelming love and support for my mother.”

Rivers’ health woes started just 12 hours after she performed an hour of stand-up before a sold-out Manhattan crowd. City EMTs rushed an unresponsive Rivers to the hospital after a 911 call at 9:40 a.m. Thursday.

At press time, there was no word as to when Joan Rivers might be brought out of the coma or what the next step in her recovery could be.

Rivers’ business partners at the QVC and E! Entertainment Television were also anxiously awaiting an update, the source said.