A new video by Putin opponent Alexei Navalny's Foundation for Fighting Corruption has been watched more than three million times on YouTube in just one week, showing that the Russian opposition can still make an impact in a society increasingly subject to state censorship.

Dubbed a "video bomb" by one commentator, the film details allegations of corruption and criminal connections among the family and associates of Russian Prosecutor-General Yuri Chaika.

Yuri Chaika has denounced the film as "baseless" and "mendacious", while the Kremlin has dismissed it because the allegations do not concern the prosecutor-general himself.

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