A former Russian spy who claims he was poisoned has died in a London hospital. Alexander Litvinenko was a fierce critic of Russian President Vladimir Putin and his government.
Litvinenko had been investigating the killing of Russian journalist Anna Politkovskaya. Also a critic of the Russian government, Politkovskaya was gunned down at her Moscow apartment last month.
Litvinenko said he became sick after meeting two Russians in a hotel on Nov. 1.
Although Litvinenko claims he was poisoned, an official cause of death hasn't been determined.