"Nepal has played a very constructive role in helping India keep track of wanted terrorists and helping our law enforcement agencies in getting them," Sandhu said as he mentioned the recent arrest of IM co-founder Yasin Bhatkal from the same area.
Sandhu, on the sidelines of a conference on IEDs here, said while there are "reliable accounts" on the strength of home-grown terror group Indian Mujahideen, the standard explosives used by this banned outfit remains to be SG-80 ( a type of gelatin stick used in bombs) and the chemical Ammonium Nitrate.
Sandhu said IEDs are gaining currency amongst militants, Naxals and other terror groups as they leave no signature and are hard to detect by enforcement agencies.
He also said central paramilitary and state police forces, rather than shunning the use of mine protected vehicles in anti-Naxal operations, should use these armoured vans but only after strictly adhering to the protocols of their usage.