At least 34 people have been killed in a Russian missile strike on Ukraine's northeastern city of Sumy. That comes less than 48 hours after Donald Trump's envoy met Vladimir Putin in Russia for more talks on ending the war.

A Russian ballistic missile strike on the northeastern Ukrainian city of Sumy killed at least 20 people on Sunday morning, the city's acting mayor said.

Over 20 people were killed by a Russian missile strike on the northern Ukrainian city of Sumy on Sunday, its acting mayor Artem Kobzar said. "The Russians hit the city of Sumy with missiles, killing civilians,