FILE - In this Jan. 19, 2012, file photo, Joan Rivers attends a screening of the Season 2 premiere of WE TV's "Joan & Melissa: Joan Knows Best?" in New York. Two police officials say Rivers has been rushed in cardiac arrest from a doctor’s office to a New York City hospital, Thursday, Aug. 28, 2014. (AP Photo/Charles Sykes, File)

NEW YORK (AP) — Joan Rivers is in a New York City hospital, one day after going into cardiac arrest at a doctor’s office.

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 did not immediately respond to request for comment Friday. On Thursday, hospital spokesman Sid Dinsay 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.