Experts found higher quantities of polonium in, for example, a urine stain on underwear worn by Arafat and a blood stain on hospital clothing than on belongings he hadn't used, such as new and unworn socks stored in the same bag.
Polonium is best known for causing the death of Alexander Litvinenko, a one-time KGB agent turned critic of the Russian government, in London in 2006. Litvinenko ingested tea laced with the substance.
Yasser Arafat's body may be exhumed to allow for more testing of the causes of his death, the Palestinian president said Wednesday, July 4, 2012.