Russia fired the biggest wave of drones of the war on Ukraine’s capital, Kyiv, on Sunday, leaving at least one person dead.

A 41-year-old man died after fragments from a drone that was shot down fell to the ground, according to Vitali Klitschko, the mayor of Kyiv, and the city’s military administration. The first wave of explosions, including three that damaged buildings across the city, came shortly after 2 a.m. local time, according to Mr. Klitschko. The air-raid warning was lifted about 6 a.m.

Russia has intensified its focus on Kyiv in May, unleashing its biggest and most sustained attack there since at least March, with near-nightly volleys of missiles and drones. Sunday’s attack, the 14th this month, appeared to be the first deadly one in May. Ukraine’s air defenses destroyed more than 40 drones, the most fired at Kyiv in one night, the city’s military administration said on Telegram.