Three people have died in Ukrainian drone and missile attacks, Russian officials said a day after a bomb attack on Ukraine’s second largest city of Kharkiv killed three people and left dozens in hospital.

The dead in Russia included two by falling debris when five Ukrainian missiles were shot down in Sevastopol, a port city in Russia-annexed Crimea, said Mikhail Razvozhayev, the city’s Moscow-installed governor. Twenty-two people were injured, he added.

One person was killed and three were injured in Russia’s Belgorod region, bordering Ukraine, when three Ukrainian drones attacked the city of Grayvoron, regional governor Vyacheslav Gladkov said.

Russia’s ministry of defence said air defence forces shot down 33 Ukrainian drones over the country’s western Bryansk, Smolensk, Lipetsk and Tula regions.

The attacks came after Russia struck Kharkiv on Saturday afternoon with four aerial bombs, hitting a five-storey residential building and killing three people.

Regional governor Oleh Syniehubov said 41 people were still being treated for injuries on Sunday.

In a video address following the attack, Ukrainian president Volodymyr Zelenskiy urged Ukraine’s partners to bolster its air defences.

“Modern air defence systems for Ukraine – such as Patriots, accelerated training of our pilots for F-16s, and most importantly, sufficient range for our weapons – are truly necessary,” he said.

Meanwhile, two people were injured by falling debris when two Russian missiles were shot down over the Kyiv region overnight, Ukraine’s air force commander Mykola Oleschuk said.