Medical aid group Medecins Sans Frontieres denied that Taliban fighters were firing from its hospital at Afghan and NATO forces before a suspected U.S. air strike killed at least 19 people in a battle to oust the Islamist insurgents from an Afghan city.<br />The northern city of Kunduz has been the scene of fierce fighting since the Taliban captured it almost a week ago.<br />Afghan security forces fought their way into Kunduz four days ago, but battles continue in many places.<br />The aid group has said an air strike, probably carried out by U.S.-led coalition forces, killed 19 staff and patients on Saturday in a hospital it runs in Kunduz, leaving 37 wounded.
