The bombardment, which Ukrainian officials said mostly targeted Kyiv, came just a day before President Trump was expected to talk with President Vladimir V. Putin of Russia.

Russia has battered Ukraine overnight with its largest drone attack since the war began, Ukraine’s military said Sunday, as Moscow intensified its military assault despite holding direct peace talks with Kyiv Friday.

Ukraine says Russia has launched its biggest drone attack since the full-scale invasion began, targeting several regions including Kyiv, where one woman died. Russia had launched 273 drones by 08:00 Sunday (05:00 GMT) targeting the central Kyiv region and Dnipropetrovsk and Donetsk regions in the east, Ukraine's air force said.