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A bomb devastated a crowded metro carriage during the morning rush hour near central Moscow.

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Rescue workers converged on the two stations to evacuate the wounded.

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They moved into the tunnels to guide surviving passengers through to safety.

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At least 39 bodies were found in the wreckage - many more were injured.

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One of those hurt, who said he was in the second carriage of the train, described a powerful explosion and a flash.

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The deadly blast occurred five weeks before President Vladimir Putin stands for re-election

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Russian police were quoted as saying the blast was probably caused by a suicide bomber.

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Relatives of commuters gathered outside the stations to wait for news.