One of the UK's richest women has been found dead in west London, the BBC understands.
The body of Eva Rausing, a member of the family behind the Tetra-Pak drink cartons empire, was reportedly found in a home in Cadogan Place, Belgravia.
The death is being treated as unexplained.
A Metropolitan Police spokesman said a 49-year-old man had been arrested in connection with her death and on suspicion of possession of drugs.
He is currently in custody at a south London police station.
Police said they searched the address and found the body after making the drugs arrest on Monday.
A post-mortem examination began at 13:00 BST at Westminster Mortuary.
In 2008 Mrs Rausing and her husband Hans Kristian Rausing faced drug charges after crack, heroin and 52g of cocaine were found in their home.
Mrs Rausing had been arrested after she allegedly tried to smuggle small amounts of crack cocaine and heroin into the US embassy in London.
Charges were then dropped and a caution issued instead.
Mr Rausing stands to inherit the £5.4bn carton business built by his Swedish father, also named Hans.
