Kiev, Ukraine (CNN) A former Russian lawmaker and Kremlin critic who fled to Ukraine last year was shot dead Thursday in Kiev -- a killing that Ukraine's president called a "Russian state terrorist act." Voronenkov becomes the latest in a string of Russian critics of President Vladimir Putin and the Russian government who were killed or injured in mysterious circumstances. Ukrainian President Petro Poroshenko called Thursday's killing a "Russian state terrorist act" on Twitter -- an accusation that drew a sharp rebuke from Moscow. Any claims that Russia is connected to the killing are "absurd," Putin spokesman Dmitry Peskov said, according to Russian state-run TASS news agency. JUST WATCHED Russian exile's death spurs conspiracies Replay More Videos ... MUST WATCH Russian exile's death spurs conspiracies 03:11A coroner's officer said it couldn't say whether Berezovsky committed suicide.

Source: CNN March 23, 2017 12:33 UTC