LOS ANGELES (AP) — Authorities said Thursday that they believe "Glee" star Naya Rivera drowned in a Southern California lake but they are continuing the search for her a day after her 4-year-old son was found alone in a rented boat.

"Investigators believe Rivera drowned in what appears to be a tragic accident," a Ventura County Sheriff's Office statement said.

The boy, who was found asleep and wearing a life vest late Wednesday afternoon, told investigators that he and his mother went swimming and he got back on the boat, but "his mom never made it out of the water," Sheriff's Sgt. Kevin Donog...