NATO is investigating claims that its planes killed 14 members of an Afghan civilian road construction crew while hunting Taliban fighters in a mountainous region. NATO's International Security Assistance Force said its warplanes conducted airstrikes against Taliban fighters in eastern Nuristan province on Monday night, and that a militant leader was targeted. "ISAF was engaged in Nurgaram and Du Ab (districts), and in those places we used airstrikes against (Taliban)," ISAF spokesman Brig. Gen. Carlos Branco told a news conference. "The situation is not clear at all at this stage. We are carrying out the investigation and trying to get a clear picture." But Afghan officials said bombs hit two tents housing Afghan engineers and laborers contracted by the US military to build a road, killing 14 workers. They blamed faulty intelligence for the mistake.