The US military carried out a missile strike in Somalia targeting a suspected militant leader with ties to al Qaeda and al Shabaab, a US military official told Reuters, speaking on condition of anonymity.
The strike took place in southern Somalia, the official said, without offering further information, including the identity of the suspect or whether the strike was believed to have been successful.
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Arthur Simpson-Kent, 48, admitted killing Ms Blake and their sons according to his lawyer.
Two brothers have been arrested on suspicion of murder after their parents were found dead in their own home over the weekend.
The first man to be convicted of murder on the basis of DNA evidence should be moved to an open prison, according to the Parole Board.