Billionaire's wife found dead

One of Britain's richest women, American-born Eva Rausing, has been found dead in her west London home.

A man has been arrested in connection with the case, British police said, adding that an autopsy had failed to uncover a formal cause of death.

Rausing, 48, was the wife of Hans Kristian Rausing, heir to the TetraPak fortune his father built by creating a successful manufacturer of laminated cardboard drink containers.

Both Rausing and her husband had long-running and often public battles against addiction, including her arrest in 2008 for reportedly trying to bring drugs into the US Embassy in London.

British police said they arrested a 49-year-old man on Monday on suspicion of drug possession and a subsequent search of an address in London's tony Belgravia neighborhood related to that arrest turned up Rausing's body later that day.

Scotland Yard said in a statement that further tests were being carried out on Rausing's body after an autopsy was inconclusive. It said officers from the Homicide and Serious Crime division were investigating "and the death continues to be treated at this time as unexplained."