Russia launched a massive attack on Ukraine overnight into Saturday with hundreds of drones, killing at least one person, part of a stepped-up bombing campaign that has dashed hopes for a breakthrough in efforts to end the more than 3-year-old war.

Russian air defense units intercepted 13 drones flying towards Moscow in under two hours, Mayor Sergey Sobyanin reported at around 1:46 a.m. local time on July 19.