The NDFB, formed in 1986, has in the past indulged in killings, kidnappings and extortions, even bomb explosions. Now, it is being directly implicated in an attack of such magnitude, which is in complete violation of the ceasefire. Documents with the SIT, some of which are with Outlook, show that the three Maruti cars used in the explosions in Guwahati have been traced to NDFB cadres who had purchased/driven them to the blast sites. One of them, Thungri Narzari, had driven the bomb-laden car and parked it near the chief judicial magistrate's court in Guwahati, the scene of one of the blasts.