Eva Rausing, one of the United Kingdom's richest women and the American wife of an heir to the multibillion-dollar Tetra Pak carton empire, was found dead in London, police said Tuesday. Her husband, Hans Kristian Rausing, 49, with whom she had four children, reportedly may have been arrested in connection.

The body of the 48-year-old was found at Cadogan Place, Belgravia. Scotland Yard told the media it is treating the death as unexplained. The police also confirmed that additional tests are being done after an autopsy failed to establish a cause of death.

Police said they arrested a 49-year-old man, but they haven't said whether the man is in fact Eva's husband. The British media is reporting that Hans Kristian Rausing was arrested in connection with his wife's unexplained death and on suspicion of drug possession. Scotland Yard has not commented on those media reports.

The suspect was arrested following a search of the couple's home. A Metropolitan Police spokesman told the BBC that the arrested man was currently getting medical attention.

Eva Rausing and her husband both struggled publicly with drug addiction.

In 2008, she was arrested outside the U.S. Embassy in London when she was reportedly found carrying crack cocaine and heroin into the building in her handbag. The Associated Press reported that the two were charged with drug possession, but prosecutors later agreed to drop the charges.

Eva Rausing's family issued a statement to the media, saying they were deeply saddened by her death and that she was a devoted wife for 20 years and a mother of four much-loved and wonderful children.