KABUL, May 28 (Xinhua) -- At least 11 militants of Islamic State (IS) outfit were killed after U.S. and NATO-led coalition forces launched airstrikes in Afghanistan's eastern province of Nangarhar, authorities said on Monday.

"The drone strikes were launched in Ghulam Dag locality of Chaparhar district on Sunday. Two IS militants were also wounded and three vehicles were destroyed after the raids," the Afghan army's Corps 201 Selab based in the region said in a statement.

The IS group, which emerged in Nangarhar in early 2015, has yet to make comments on the report.

Also on Sunday, Afghan army's helicopters struck and destroyed two heroin factories in Mamla area of the neighboring Khogyani district, the statement said.

The mountainous province, 120 km east of Kabul, has been the scene of clashes between security forces and armed militants.

The clashes have forced thousands of villagers to flee to safer places.