(CNN) Russia's leading Kremlin critic, Alexey Navalny , was detained by police in Moscow on Sunday, moments after his return to the country and five months after he was poisoned with the nerve agent Novichok. "This is the best day in the past five months," Navalny told journalists at the airport just before his arrest. Passengers and journalists take photos of Alexey Navalny as he takes his seat on the flight Sunday. Russia denies involvement in Navalny's poisoning. Russian opposition leader Alexei Navalny is seen in a Pobeda plane after it landed at Moscow's Sheremetyevo airport on January 17, 2021.

Source: CNN January 17, 2021 14:26 UTC