The Red Cross says one of its aid workers was killed on Thursday when an artillery shell landed near its office in Donetsk, eastern Ukraine.<br /><br />The victim was a Swiss national, and the Ukrainian foreign ministry condemned pro-Russian separatists for firing on the area. The ICRC office is less than a kilometre from the rebel-occupied public security headquarters, and the separatists said it was Ukrainian forces that had fired the shell.<br /><br />While Ukraine’s president insists the ceasefire is holding, the fighting for Donetsk airport has never stopped, and in recent days has intensified as the pro-Russians try to wrest it from Kyiv’s hands. The Ukrainians claim they have repulsed two serious attacks and accuse the separatists of using the ceasefire to increase their territorial gains.