A man has been arrested on suspicion of the murders of ex-EastEnders actress Sian Blake and her two children, police said.
Arthur Simpson-Kent, 48, was detained by Metropolitan Police officers at Heathrow Airport after arriving on a flight from Ghana.
He has been taken to a west London police station.
Ms Blake and her sons Zachary, eight, and four-year-old Amon vanished on December 13 and were found buried in the garden of their family home in Erith, Kent, on January 5.