A further two dozen people were injured in the attack on the town of Bekhtery, officials said.
Two Ukrainian rocket hits damaged a school building in the town located about 30km south of the Russian-Ukrainian front line, Russian authorities said.
The missiles used were equipped with warheads containing cluster bombs, they added.
The report from the war zone could not be independently verified.
Ukraine has been defending itself against a Russian invasion for almost three years, with parts of the Kherson region under Russian control since then.
Since the retreat of the Russian forces from the regional capital of Kherson in November 2022, the Dnipro river has separated the two armies in the region.
I congratulate President Trump and the American people on the inauguration of the 47th President of the United States. Today is a day of change and also a day of hope for the resolution of many problems, including global challenges.— Volodymyr Zelenskyy / Володимир Зеленський (@ZelenskyyUa) President Trump is always decisive, and the…January 20, 2025
Ukraine's State Investigation Bureau (DBR) said on Monday it had detained two generals and a colonel suspected of negligence in failing to adequately defend against a Russian offensive in the Kharkiv region last year.
The DBR said in a statement on Telegram the detained officers were the former chief commander of the Kharkiv frontline, a former commander of a brigade and a former commander of an infantry battalion.
It did not give their names.
Russia launched an assault across the border in May 2024 into Ukraine's northern region of Kharkiv, advancing by several kilometres in the first few days.
The attack alarmed Ukraine, causing President Volodymyr Zelenskiy to cancel scheduled foreign trips and fire several military commanders as he dealt with the unfolding crisis.
Ukraine's military was eventually able to halt the Russian advance about 25km away from the edge of Kharkiv, Ukraine's second largest city, which Russia had unsuccessfully attempted to capture at the start of its invasion in 2022 before pulling back.
The DBR said it had co-operated with Ukraine's domestic intelligence service in the case, and had been assisted by the defence ministry and the military command.
Russian President Vladimir Putin congratulated new US President Donald Trump on taking office and said he was open to dialogue with the new US administration on Ukraine and nuclear arms.
Putin, who said he wanted to secure a long-lasting peace in Ukraine rather than a short ceasefire, made the comments during a meeting of Russia's Security Council that was shown on state TV.
"We see the statements by the newly elected president of the United States and members of his team about the desire to restore direct contacts with Russia," said Putin.
"We also hear his statement about the need to do everything possible to prevent World War III. We of course welcome this attitude and congratulate the elected president of the United States of America on taking office."
Trump has promised to swiftly end the war in Ukraine although he has not explained exactly how he would do that.
Putin has said before that he is ready for talks but that Russia's territorial gains and claims must be accepted, something the Ukrainian leadership has rejected as an unacceptable capitulation.
"As for the resolution of the situation (in Ukraine) itself, I would like to emphasise that the goal should not be a brief ceasefire, not some kind of period of respite that would allow a regrouping and rearmament of forces, but a long-term peace based on respect for the legitimate interests of all people and all peoples who live in the region," Putin said on Monday.
with Reuters
32°C