A nation-wide hunt is on to catch the man who purchased the 100 CC TVS Suzuki Max motorcycle from Vellore and triggered off a blast in Bengaluru on Wednesday, even as the security agencies are scanning Kerala and Tamil Nadu-based radical groups, such as the Jam-i-yyathul Ansarul Muslimeen (JIAM), to nail the perpetrators.
While the final confirmation on the explosive used in the device that triggered the blast is awaited - as the residue getting water-hosed at the spot- it is suspected that some 500 grams of nitro high intensity explosive, possibly RDX or PETN or TNT, was used.
Security agencies, however, are curious about why the perpetrators chose morning time (10.31 am) to trigger the timer device, without shrapnel, placed in a motorcycle near a police picket outside the state BJP headquarters. This has led to the suspicion that the blast was aimed at police personnel by angry radical group backed by a Muslim political leader from Kerala.
After searching for clues in Bengaluru, Chennai, Vellore, Kanchipuram, Tirunelveli and Thiruvanthapuram, investigators are trying to trace the man who purchased the 2001 Suzuki motorcycle ( TN 22R 3769) from a Vellore auto-consultant on April 15 on the basis of fake papers and disappeared after the blast.
The Karnataka police is preparing a sketch of the suspect on the basis of Vellore auto-consultant's description. "We have definite leads in the case but the group behind the blast will only be known after the man is caught. The city has been targeted by Indian Mujahideen, JIAM and Lashkar-e-Taiba in the past apart from radical activities of Kerala-based groups," said a senior official.
The fact is the Darbhanga module of IM has been active in Tambaram and Chennai, and mastermind Yasin Bhatkal was involved in construction business with fellow terrorist Muddasir Yasin in Bengaluru for five years.Agencies are also trying to track down all calls made to Pakistan from Bengaluru before and after the blast on April 17.