Russia has unleashed two waves of air attacks on the Ukrainian capital, Kyiv, killing at least one person and wounding another, according to officials.

Axar.az reports that Kyiv’s air defence systems downed at least 40 drones moving towards the city in the early hours of Sunday, according to Mayor Vitali Klitschko, with falling debris killing a 41-year-old man and wounding a 35-year-old woman.

“Stay in shelters. The attack is massive!” the mayor said on Telegram.

The pre-dawn attacks came on the last Sunday of May when the capital celebrates Kyiv Day, the anniversary of its official founding 1,541 years ago.

The day is typically marked by street fairs, live concerts and special museum exhibitions plans which have been made for this year as well, but on a smaller scale.