Kyiv's mayor said one person was killed in the capital after the latest Russian assault. Meanwhile, Vladimir Putin ordered a bolstering of border security to facilitate "fast movement" into Ukraine.
The Ukrainian capital was targeted by a fresh "massive" Russian drone attack, Kyiv Mayor Vitali Klitschko said on Telegram early Sunday.
Klischko said the assault left one person dead and another hospitalized.
"A 35-year-old woman was hospitalized, a 41-year-old man died," Klitschko said. He also said that the drone attack caused a fire in Kyiv's Holosiivskyi district, adding that it was contained.
Russia has frequently used Iranian-produced drones to attack Ukraine. Iran's supposed involvement in Russia's invasion has lead to worsening ties between the Ukrainian government and the Islamic Republic.
The latest drone assault on Kyiv came as the city celebrates the anniversary of its founding 1,541 years ago. The anniversary, known as Kyiv Day, is celebrated on the last Sunday of May.