Litvinenko death: 'Several Kremlin critics now dead'

An inquest into former spy Alexander Litvinenko's death will examine claims the Russian government was involved.

Mr Litvinenko, 43, is thought to have been poisoned with polonium-210 after meeting two Russians for tea at a central London hotel in November 2006.

Speaking to the BBC, the former KGB general Oleg Kalugin suggested that the Kremlin had a history of silencing its critics since the fall of the Soviet Union.