Russian forces are pounding the city of Lysychansk and its surroundings in an all-out attempt to seize the last stronghold of resistance in eastern Ukraine’s Luhansk province, the governour said on Saturday. Ukrainian fighters have spent weeks trying to defend the city and to keep it from falling to Russia, as neighbouring Sievierodonetsk did a week ago. The Russian Defense Ministry said its forces took control of an oil refinery on Lysychansk’s edge in recent days, but Luhansk governour Serhiy Haidai reported on Friday that fighting for the facility continued. “Over the last day, the occupier…