Russia for the second night in row bombed the city of Kharkiv in northeastern Ukraine, injuring two people, sparking fires and damaging a kindergarten and private houses.

Mayor Ihor Terekhov said the attacks on Kharkiv, Ukraine’s second-largest city, lasted most of the night and hit the city’s largest and oldest district.

“The sixth explosion in Kharkiv,” Terekhov said in a post on the Telegram messaging app at 0255 GMT on Monday.

It was not clear what was targeted in the attacks that came a week after a US-brokered partial ceasefire on strikes on energy and Black Sea infrastructure.

Meanwhile, both sides have accused each other of breaking the moratorium.

Ukrainian President Volodymyr Zelenskyy on Sunday said Moscow had fired more than 1,000 drones in the past week and called for a response from the US and other allies.

Russia in turn said Ukraine’s drones attacked energy facilities last week.

Recall that Russia invaded Ukraine in February 2022 and has waged a bloody and brutal three-year war.

Both sides, however, denied targeting civilians, saying their attacks were aimed at destroying each other’s infrastructure crucial to war efforts.

Over the weekend a Russian drone strike on Kharkiv killed two people and wounded 35.

The regional governor of the Kharkiv, Oleh Sinehubov, said on Monday that the overnight attacks followed a late Sunday missile strike on the city of Kupiansk that left three injured and demolished more than 10 houses and a local cemetery.

Russia seized Kupiansk, east of Kharkiv early in the invasion of Ukraine and recaptured by Ukrainian troops later that year.

It has now come under new, intense Russian pressure.

At the time of filing this report, there was no immediate comment from Moscow on the attacks.

Russia pounds Ukraine’s Kharkiv for second night in row