Ukraine President Volodymyr Zelensky on Sunday hit out at Russia's claim that his country was preparing provocations with the use of a "dirty bomb". In a rare call with his British, French and Turkish counterparts, Russia defence minister Sergei Shoigu conveyed concerns about possible provocations by Kyiv with the use of a "dirty bomb"- a device that uses explosives to scatter radioactive waste. Repeatedly, the Russian authorities have alleged that Ukraine could detonate a dirty bomb in a false flag attack and blame it on Moscow.