A former Russian oil tycoon has gone on hunger strike over what he claims is an unfair extension of his prison sentence. <br /><br />Mikhail Khodorkovsky, once Russia's richest man, is serving an eight-year sentence for tax evasion following a trial his supporters described as a farce.<br /><br />Last week his detention in Moscow's notorious Sailor's Rest prison was extended by three months, in a trial that could lead to him being sentenced to an additional 22 years on charges of theft and money laundering.<br /><br />Neave Barker reports from Moscow.
