At least 15 militants were killed and three others arrested as a clash flared up between them and the security forces in Baghlan province of Afghanistan on Monday, officials said.According to the officials, three militants have been arrested and a stock of arms and ammunitions was destroyed during the fighting, Xinhua news agency reported.The strategically important Dand-e-Ghori district outside provincial capital Pul-e-Khumri, 160 km north of Kabul, was overrun by Taliban a few months ago and the government forces are trying to recapture it.