Russian overnight drone attacks on Ukraine focused on the north-eastern city of Kharkiv, continuing a pattern seen over recent weeks, Ukrainian authorities reported on Sunday.
"Kharkiv is a danger zone. The city is coming under attack from Shahed drones," city mayor Ihor Terekhov posted on Telegram shortly before midnight on Saturday.
On Sunday, the Ukrainian air force reported that all 10 Russian drones over the Kharkiv region had been intercepted.
The air attack had targeted critical infrastructure of the city, which lies some 40 kilometres south of the Russian border, Kharkiv Governor Oleh Syniehubov reported. National public broadcaster Suspilne reported power cuts in some parts of the city.
Before Russian launched its all-out invasion in February 2022, Kharkiv was Ukraine's second-largest city and had a population of around 1.5 million.
Russia has intensified its attacks on the city since mid-March, hitting power supplies in particular. Given its proximity to the Russian border, the aerial attacks come with little advance warning, and there are fears that the city could gradually become uninhabitable.
The village of Vesele, which lies in the region close to the Russian border, suffered a hit. A couple were found dead in their bombed-out home.
In Moscow, the Russian Defence Ministry reported on Sunday that 10 Ukrainian drones had been intercepted in the early hours over the Krasnodar region in the south of the country. Details about possible targets were not released.