In his daily video address, Ukrainian President Volodymyr Zelenskyy dismissed Moscow’s claims that Ukraine was preparing provocations with the use of a “dirty bomb”, as suggested by Russia’s defense minister during telephone calls with NATO counterparts.”If Russia calls and says that Ukraine is allegedly preparing something, it means one thing: Russia has already prepared all this. I believe that now the world should react as harshly as possible,” Zelenskyy said.The Ukrainian president also said that only Russia was capable of using nuclear weapons in Europe.”If anyone can use nuclear weapons in this part of Europe — it can be only one source — and that source is the one that has ordered comrade Shoigu to telephone here or there,” Zelenskyy said.Earlier on Sunday, Ukraine’s Foreign Minister Dmytro Kuleba denounced Moscow’s claims as “absurd” and “dangerous”. “Russians often accuse others of what they plan themselves,” he added.