The bodies of “Eastenders” actress Sian Blake and her two young sons were discovered in the garden of the family’s south-east London home on Wednesday.

Blake, 43, along with Zachary Bilal Kent-Blake, 8, and Amon Ben George Kent-Blake, 4, had not been seen since Dec. 13 and were officially reported missing three days later, according to BBC News.

A police spokesperson said they had died from “head and neck injuries.”

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Blake’s partner, Arthur Simpson-Kent, is being sought by police in connection to the deaths, and it is suspected that he may have left the U.K. for Ghana.

The 48-year-old, who played Frankie Pierre on the long-running BBC soap from 1996 and 1997, disappeared after speaking to detectives on Dec. 16.

“Unfortunately, I believe Arthur was responsible. I want him to face justice and explain why,” Sian’s sister, Ava Blake, told ITV News. “He’ll have to answer to the courts of this country and to God eventually.”

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Forensic specialists had searched the family home on Jan. 4, and the bodies were discovered during excavations in the garden two days later.

The British actress had been diagnosed with a motor-neuron disease, which damages the nervous system and the cells that control voluntary muscles of the body.