The strike came as a senior US diplomat said that Ukrainian President Volodymyr Zelensky's recently announced — but still confidential — plan for winning the war "can work" and help end the conflict that is now in its third year.

Ukrainian drones have struck a large military depot in a town deep inside Russia overnight, causing a huge blaze and prompting the evacuation of residents.

Russell Bentley, a U.S. national who went missing in Russian-controlled eastern Ukraine early this year, is believed to have been tortured to death by Russian soldiers who are now set to go on trial,