British police have arrested one of the UK's richest men after his wife was found dead at their luxury London home.
Hans Kristian Rausing, heir to the multi-billion-dollar Tetra-Pak fortune, is being questioned by police after his wife Eva's body was found during a search of the couple's house in Chelsea, London.
Metropolitan Police detained the 49-year-old man at a south London police station on suspicion of possession of drugs and also in connection with the death.
Officers from the Homicide and Serious Crime Command were investigating, and the death was being treated as unexplained, police said in a statement.
Rausing later left the station in order to receive medical attention, according to the statement.
The Rausing family, headed by Rausing's father Hans, is worth $6.7 billion, according to this year's Sunday Times Rich List.
Rausing and his wife Eva were charged in 2008 after she tried to take crack cocaine and heroin into the US embassy in London.
Police later searched the couple's house where they found crack cocaine, heroin and cocaine.
Although they were initially charged with drugs offences, prosecutors subsequently decided to drop the charges and instead give them a conditional police caution. This means they admitted possessing the drugs.