The former chief of the now-closed Yukos oil firm told BBC Thursday it is now clear that Putin sees him as "a serious threat." He said he feels safe in London and is interested in seeking asylum.
Khodorkovsky, 52, spent 10 years in prison on tax evasion and embezzlement charges widely seen as punishment for challenging Putin's authority.
His oil company, once Russia's largest, was dismantled and sold off to state-owned firms.