Ukrainian President Volodymyr Zelenskiy on Tuesday published a photo of prominent pro-Russian Ukrainian politician Viktor Medvedchuk in handcuffs after what he said was an operation by security forces.
In February, Kyiv said Medvedchuk, the leader of the Opposition Platform - For Life party, had escaped from house arrest.
Last year authorities opened a treason case against Medvedchuk, who says Russian President Vladimir Putin is godfather to his daughter, and who denies wrongdoing.
(Reporting by Max Hunder, writing by David Ljunggren, editing by Chris Reese)