俄罗斯成千上万民众游行支持反对党

Russian opposition leader Alexei Navalny has been released from police detention in Moscow after thousands of pro-opposition marchers rallied against a March election expected to extend President Vladimir Putin's term in Kremlin.

Police arrested Navalny while he was on his way to a rally in central Moscow.

Earlier, police raided his Moscow headquarters, breaking into the office with a power saw. Officials claimed someone had reported a bomb threat.

Thousands of protesters braved freezing temperatures as low as minus 45 degrees to stage rallies in dozens of cities across Russia to protest what Navalny and his supporters call upcoming "pseudo-elections."

Navalny is urging Russians to boycott the March presidential election, in which Vladimir Putin is just about assured to win a fourth term.