At least 25 militants were killed and about two dozen injured as government forces launched clean-up operations in the eastern Nangarhar province of Afghanistan, an official statement said on Sunday."The security forces backed by warplanes began attacks in Kot, Khogiani and Ghani Khil districts on Saturday night and so far 18 militants loyal to Islamic State group and seven Taliban insurgents have been killed," Xinhua news agency quoted the statement as saying.According to the statement, 22 more militants loyal to the IS outfit and two Taliban fighters were injured.Neither Taliban nor the Islamic State outfit has commented yet.