Ukraine says a Russian attack in the eastern region of Kharkiv has killed at least 50 people.

The Internal Affairs Ministry said the attack hit a village near the city of Kupiansk on Thursday.

Internal Affairs Minister Ihor Klymenko told the media that a shop and a cafe had been struck as many people gathered there for a memorial service.

President Volodymyr Zelenskyy denounced the attack as a brutal crime. He added that Russian terror must be stopped.

Ukraine's presidential office said a 6-year-old boy was among the dead.

The office earlier said President Zelenskyy had visited a frontline area extending from Kupiansk to Lyman in the eastern region of Donetsk on Tuesday.

The office added that the Kupiansk-Lyman line was "one of the hottest on the frontline," where Russian forces were constantly trying to carry out offensive actions.