Naya Rivera was killed after her disappearance in a lake in California

Actress Naya Rivera is believed to have died after her disappearance in a lake in southern California, according to the Ventura County Sheriff's Office

Naya Rivera Authorities said actress Glee Naya Rivera was killed after her disappearance in a lake in California

Actress Naya Rivera is believed to have died after her disappearance in a lake in southern California, according to the Ventura County Sheriff's Office

"We are assuming an accident and we are assuming it sank in the lake," Ventura County deputy police chief Chris Dyer told a news conference Thursday.

Dyer said that the actress' search and rescue efforts have now turned into a recovery process.

He said: "The goal is to return Miss Rivera to her family."

Rivera, 33, disappeared from Piru Lake on Wednesday evening. She went to the lake that afternoon and rented a floating boat with her 4-year-old son, according to the authorities.

Dyer said on Thursday that the boat was late at 4 pm. Local time. A charter worker found the boat at the northern end of Lake Piru.

Dyer said Rivera's son was on the boat, but could not find her place. The search effort began immediately and lasted until 10 pm. Wednesday.

Ventura County Sheriff's Office, Captain Eric Busho, said earlier that the child and his mother had gone swimming and had not returned to the boat. He said the child was wearing a life jacket and an adult life jacket was found on the boat.

Dyer said Thursday morning that the child is in good health with a family. CNN contacted Rivera representatives for more details.

Al-Sharif's office said on Twitter that officials resumed the search Thursday morning, and closed the lake during the operation, which includes more than 80 people.

Rivera has played Santana Lopez on Fox for six years from 2009, and has appeared in almost every episode of musical comedy drama. She also participated in the CBS comedy series "The Royal Family" and in the comedy movie "The Master of Disguise."

Celebrity classmates, including co-star Glee Harry Shum Jr. , Share their concern on social media.

Actress Jackie Harry tweeted a scene she shared with Rivera in the sitcom "Royal Family" which was her first acting role in Rivera at the age of 4

Harry prayed "Prayers for the Beautiful Naia Rivera". "We stared alongside each other in her first TV series, The Royal Family, and she has seen her career boom since then. Please, Lord, do not cut short this life."

Zach Tiberman, who described himself as a previous propaganda by Rivera, said he was shocked by the news of her disappearance.

On social media, he said

 "I still don't believe what I hear and hope it isn't true." "I am just sad. Naya Rivera was one of the first people I had the honor to work with in 2009 when she entered public relations and moved to Hollywood. One of the first people to let me give her advice and guidance during those blissful days."

Rivera was previously married to actor Ryan Dorsey.

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