Brussels (AFP) – European Union leaders agreed late Monday to ban more than two-thirds of Russian oil imports, tightening economic screws on the country even as Moscow’s forces made gains in the eastern Donbas region of war-ravaged Ukraine. The compromise deal, meant to punish Russia for its invasion three months ago, cuts “a huge source of financing for its war machine,” European Council chief Charles Michel tweeted. “Maximum pressure on Russia to end the war,” he said. Leaders of the 27-nation bloc had met to negotiate the long-sought deal earlier Monday in Brussels, amid concerns raised b…