The police after examining the circuit used for the explosion on Sept 7, 2011 found that a three-battery remote was used for the operation. The same sort of remote was used by terrorists in earlier explosions like the one in Sangrama in Sopore of North Kashmir, Udhampur in May during an unsuccessful attack on an Army officer and during the assassination opearation of Jamiat-e-Ahl-e-Hadees head Maluana Showkat Ahmad Shah in April.
This particular three-battery remote is believed to have more range and is a comparatively new technology that will give more time for the terrorists to leave the scene of crime. The breakthrough was possible since it was the same team of National Investigation Agency (NIA) that collected the samples from the Udhampur blast and also that of Sangrama IED. The NIA is looking into the Delhi High Court probe as well.
Sources revealed that an investigation by the Jammu and Kashmir Police and central agencies have found that at least 6 such remotes was smuggled to the Indian territory during the cross Line of Control (LoC) trade from Uri of North Kashmir.
Meanwhile, search is on for the mastermind in the Delhi High Court blast case, Junaid Akram Malik. The NIA has already announced a cash reward of Rs 10 lakh for information leading to the arrest of Junaid.