The barrage comes ahead of a planned call between Presidents Trump and Putin on Monday, as the US pushes for a ceasefire.

Trump has shifted U.S. rhetoric from supporting Ukraine toward accepting some of Moscow's narrative about the war. Kyiv and its European allies are working hard to persuade him that it is now Moscow that is holding up a truce.

Russia overnight launched its most intense drone attack on Ukraine since the beginning of its full-scale invasion in 2022. Russia fired a total of 273 exploding drones and decoys, Ukraine’s air force said Sunday.

In the early hours of May 16, Russian forces launched kamikaze drones toward Ukraine from two directions as part of yet another air attack. Air raid alerts were declared in several regions due to the threat of Shahed drone strikes,