Fighting broke out between government forces and pro-Russia rebels in Ukraine this weekend, threatening a fragile cease-fire as Russia sent a new, unauthorized aid convoy into the embattled country, The Associated Press reported. Ukraine's military said Saturday that it fought off a rebel attack on the government-held airport of Donetsk and admitted for the first time since the cease-fire started that it had killed rebels. Meanwhile on Saturday, a Russian convoy of more than 200 trucks crossed the border unimpeded to deliver humanitarian aid to the war-torn region.
