Russian attacks across Ukraine kill 1, injure 4 over past day.

Ukraine war latest: Zelensky says Russia's Kharkiv offensive failed; Ukraine hits Russian Su-57 aircraft for first time

Key developments on June 8, 9: * Zelensky: Russia failed to fulfill its Kharkiv operation * Military intelligence: Ukraine hits Russian Su-57 jet for first time * Collaborator ex-mayor of Kupiansk in 'critical condition' after assassination attempt in Russia, military intelligence says * Russia...