The Russian blogger leading Russia's vote-rigging protests has accused supporters of Vladimir Putin of seeking to smear him with a fake photo.
Alexei Navalny proved that a picture in a newspaper distributed by Putin supporters was a forgery when he published the original on his blog.
The faked photo shows Mr Navalny alongside fugitive Russian tycoon Boris Berezovsky, who lives in London.
Protesters fear the March presidential vote may be rigged to favour Mr Putin.
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