Russian opposition leader Alexei Navalny has been formally barred from competing in next year’s presidential election.
The Central Electoral Commission has said Mr Navalny was ineligible because of a corruption conviction which he says is politically motivated.
He has urged his supporters to boycott the March vote.
Mr Navalny was widely regarded as the only candidate with a chance of challenging President Vladimir Putin.
Mr Putin is seeking a fourth term that would see him become the longest-serving Russian leader since Joseph Stalin.