Actress Naya Rivera was presumed dead after her unaccompanied 4-year-old son was found floating on a boat on Lake Piru in Ventura County Wednesday, authorities said.
The Ventura County Sheriff's Department said it responded to a report of the toddler alone on a boat around 4:48 p.m. Officers on scene found the child, but no information was immediately released about the child's condition.
A dive team and air unit were deployed in response, the VCSD said.
The department was investigating a possible drowning associated with the child.
The actress and singer went swimming and the boy got back into the boat but the mother did not, the sheriff's department said. The boy had a life vest but the mother did not, officials said.
Divers were searching for the mother of the 4-year-old, who was found alone in a pontoon boat about three hours after it was rented.