Ukrainian drone strikes have heightened anxiety across Moscow ahead of this year’s May 9 parade on Red Square, where President Vladimir Putin will be watching with other leaders.

Russia says Ukraine launched a drone attack on Moscow - days before the start of a ceasefire, ordered by Russian President Vladimir Putin to coincide with a World War Two parade. Moscow's four major airports shut for a few hours on Tuesday amid the barrage, authorities said. There were no casualties and Ukraine has not commented.