Russian police are searching the campaign headquarters of opposition leader Alexei Navalny in St Petersburg ahead of a presidential election on March 18, a video feed streamed live to the Internet by Navalny's supporters shows.
The feed showed police checking campaigners' passports on Thursday.
Russia's central election commission declined to register Navalny as a candidate in the election, citing what Navalny said was a trumped up criminal conviction.
Thursday's police search took place on the same day as President Vladimir Putin, who polls show is on track to be comfortably re-elected, was visiting St Petersburg.
