Home Ministry is planning to hand over three terror related cases, where members of banned SIMI were suspected to be involved, to the National Investigation Agency (NIA).
Official sources said the March 31 Patna flat blast where suspected terrorists were making bombs, the December 6, 2014 explosion at a VHP function in Roorkee (Uttarakhand), in which a 12-year-old was killed, and the blast near Pune's Dagdusheth Halwai Ganapati temple on July 10, 2014 in which five people, including a policeman, were injured, may go to NIA.
"All these cases had some uncanny similarity with each other. We strongly suspect that SIMI members could be behind in these incidents. And that is why we are thinking of asking the NIA to take over the probe," sources said.
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The remaining three terrorists of the SIMI continue to be at large and police of several states are looking for them.
The group is suspected to be involved in a bank robbery in Karimnagar (Telangana) on February 1, 2014, and blast at Bijnore in Uttar Pradesh in September 2014.
Even Home Minister Rajnath Singh had termed the five terrorists belonging to SIMI as a "major security challenge to the country".
Formed in Aligarh in 1977, SIMI was declared a terror outfit and banned for five years in 2002. The ban on the organisation has been renewed two times since then.