"The Uttarakhand police has been alerted about the possibility of SIMI terrorists in their territory," IG (law and order) Amrendra Sengar told reporters. 

Three SIMI terrorists, allegedly involved in a blast on September 12 in Mohalla Jatan of Bijnor, had managed to escape after the incident. The trio were staying near a room where the blast had taken place, and their partners as tenants in a house.