General Staff: Russia has lost 512,420 troops in Ukraine since Feb. 24, 2022.

Ukraine war latest: US Vice President Kamala Harris will attend global peace summit in Biden's place

Key updates on June 3: * US Vice President Kamala Harris will attend global peace summit * Russian strike in Donetsk Oblast kills 2, including 12-year-old boy * UK military chief confident Ukraine will win the war, but allies must 'maintain support' * Restarting Zaporizhzhia nuclear plant 'diff...