A Russian guided bomb attack in Ukraine’s northeastern Sumy region bordering Russia’s region of Kursk killed two people, prosecutors said on Thursday.

Moscow troops dropped two guided bombs on civilian infrastructure, according to the regional prosecutors’ statement on Telegram. One person was injured in the attack, it added.

President Vladimir Putin on Thursday accused Ukraine of trying to strike Russia’s Kursk nuclear power plant in an overnight attack and said Moscow had informed the UN nuclear safety watchdog about the situation.

Putin, who did not provide further details about the incident or provide documentary evidence to back up his assertion, made the comments at a meeting of senior officials.

There was no immediate comment from Ukraine whose lightning incursion into Kursk, the biggest into Russia by a foreign power since World War Two, saw thousands of Ukrainian troops punch through Russia’s western border on 6 August, apparently catching Moscow by surprise.

Ukraine ratified the Rome Statute of the International Criminal Court, taking a step toward membership and opening the possibility of more prosecutions of Russian officials for war crimes.

Ukraine’s parliament, the Verkhovna Rada, voted Wednesday to ratify the ICC statute.

Membership of the ICC is a requirement for joining the European Union, which Ukraine hopes to do. It was formally accepted as a candidate in June 2022, four months after Russia began its full-scale invasion.

Ukraine’s border guard service said on Thursday that Kyiv had seen no signs of Belarusian troop or military hardware movements near their shared border since Minsk announced it was sending additional forces to the area.

Belarusian President Alexander Lukashenko said on Sunday the country had deployed nearly a third of its armed forces along the border, claiming that Kyiv had stationed more than 120,000 troops there.

“We do not see any movement directly near our border - neither equipment nor personnel,” Andriy Demchenko, Ukraine’s border guard service spokesman, told national television.

He added that the situation near the Belarus border “generally has not changed”.