Russian tycoon Khodorkovsky has been released from jail
Putin signs decree pardoning Mikhail Khodorkovsky,
The Kremlin said the decree took immediate effect and the former Yukos oil company chief could has been released from jail, reports say.
Putin announced unexpectedly on Thursday that he would pardon Khodorkovsky, who was once Russia's richest man and is seen by Kremlin critics as a political prisoner.
The decree pardoned Khodorkovsky on the basis of "the principles of humanism".