At least 80 people have reportedly been arrested as supporters of opposition leader Alexei Navalny hold protests in some 80 cities across Russia.
They are demanding he be allowed to stand in 2018 presidential elections.
BBC: Protests for Navalny across Russia on Putin birthday
Demonstrators walk along Tverskaya street during an unauthorized anti-Kremlin rally called by opposition leader Alexei Navalny, who is serving a 20-day jail sentence, in downtown Moscow on Oct. 7, President Vladimir Putin's 65th birthday.
