MOSCOW, RUSSIA - MAY 12: Polish ambassador to Russia, Krzysztof Krajewski, leaves after laying flowers at the Moscow representative office of Russia?????s republic of Tatarstan as a tribute to the Kazan school shooting victims, in Moscow, Russia on May 12, 2021. Nine people were killed and 19 injured in a school shooting in Kazan, capital of Russia?????s republic of Tatarstan on Tuesday. Sefa Karacan / Anadolu Agency/ABACAPRESS.COM