New Delhi, Sept. 9 -- The National Investigation Agency (NIA) has sparked a political firestorm after omitting Unlawful Activities (Prevention) Act (UAPA) anti-terror charges from its latest chargesheet against American national Matthew Aaron VanDyke and six Ukrainian nationals.

Filed in a Delhi court just as the mandatory 180-day judicial custody window was set to expire, the primary chargesheet instead focuses on provisions under the Immigration and Foreigners Act (IFA).

While the defence terms the move a blow to the agency's credibility and Opposition leaders accuse the government of caving to foreign pressure, official sources maintain that the larger terror investigation remains fully active.

The NIA filed the chargesheet before t...