Russia would require a halt to U.S. and European arms supplies to Ukraine during any potential ceasefire, Kremlin spokesman Dmitry Peskov said in an interview with ABC News. "Otherwise it will be an advantage for Ukraine.

Russia said on Saturday that fighting had been taking place in four regions of Ukraine despite this week's unilateral ceasefire by Moscow, saying its troops had been forced to respond to Ukrainian attacks.

Russia on May 9 paraded combat drones that its forces use in the war in Ukraine on Moscow's Red Square. President Vladimir Putin, Chinese President Xi Jinping and more than two dozen other foreign leaders looked on as various truck-mounted Russian-made drones were driven across the vast square on their launchers,

Russia marked the Soviet Union's victory over Nazi Germany with its traditional military parade on Friday - but this time the weapons displayed included drones used in the Ukraine war as President Vladimir Putin drew parallels between the two conflicts.