General Staff: Russia has lost 516,080 troops in Ukraine since Feb. 24, 2022.

Ukraine war latest: Russian tugboat destroyed, Biden calls Putin 'tyrant bent on domination'

Key developments on June 6: * Ukraine's military intelligence destroys Russian tugboat in Crimea * Russian forces using thermobaric munitions in attacks on Chasiv Yar, says Ukraine * 'We're not authorizing strikes on Moscow,' Biden says on Ukraine's use of US arms * 'A tyrant bent on domination...