Authorities release 911 call reporting Naya Rivera missing

Authorities have released the 911 call where "Glee" star Naya Rivera was reported missing at a Southern California lake.

An unidentified woman placed the 911 call on Wednesday, saying: "The emergency is we have a missing person. We found a little girl in one of the boats by the south end and her mom is nowhere to be found."

The Ventura County Sheriff's Department said Thursday that they believe Rivera drowned in Lake Piru but they are continuing to search for her.

Sheriff's Sgt. Kevin Donoghue said there was no sign Rivera ever left the waters of the lake, where her four-year-old son was found alone on a boat they had rented a day.

He said the search has shifted from an attempt to rescue Rivera to an attempt to recover the 33-year-old's body.