Investigation
The police suspect the involvement of Bangladesh-based terror group Harkat-ul-Jihad-e-Islami (HuJI), a group which has been frequently blamed for attacks in Uttar Pradesh and Hyderabad. HuJI which has been using Tripura as a transit route lately, as the state shares a porous 856-km border with the neighbouring country. Three suspected HuJI members were arrested in Agartala in the last two months. Tripura has long been a conduit for smuggling and terror merchandise, most violence in the state had been related to insurgencies of tribal groups.
Tripura's two main insurgent groups, the National Liberation Front of Tripura (NLFT) and the All-Tripura Tiger Force (ATTF) have not had a history of carrying out bomb attacks on civilians. However, a possible link between the two outfits and Bangladeshi Islamist groups like Huji had not been ruled out by security agencies. Tripura's long border with Bangladesh, as well as the presence of senior leaders of both NLFT and ATTF in Bangladesh have increased the likelihood of logistical support to Huji.
Experts from the National Security Guards (NSG) began an investigation seeking to find the nature of explosives used. The team of NSG experts, led by Major Karam Bir from New Delhi, and a team of experts from the National Forensic Laboratory in Kolkata are investigating along with Tripura police officials.
DIG (Police Control), Nepal Das said six persons have been arrested in connection to the attacks. Four persons, including one of those seen on a bike at the Radhanagar bus stand shortly before the blast there, were arrested on the same night of the explosions. And additional two others were arrested later.
Read more about this topic: 2008 Agartala Bombings