A Ukraine official has accused Iran of responsibility for the "murders of Ukrainians" after Russia attacked cities with what Kyiv called "kamikaze drones" made in the Islamic Republic and allegedly sold to Moscow. Ukraine has reported a barrage of Russian air attacks using Iranian-made Shahed-136 drones in recent weeks. Iran denies supplying the drones to Russia, while the Kremlin has not commented. Last month President Volodymyr Zelenskyy announced the accreditation of the Iranian ambassador was revoked as a result of Russian forces using Iranian drones to attack Ukraine. "Iran is responsible for the murders of Ukrainians," Ukrainian presidential adviser Mykhailo Podolyak wrote on Twitter on Monday.