At least 12 persons including two SSB jawans were injured in a grenade blast in Guwahati. Though the investigation is on, the police so far have failed to detain anyone in this regard. Security has already intensified their operation against the insurgent groups operating in the state. Condemning the blast, Assam chief minister Sarbananda Sonowal has asked the DGP to speed up the investigation and book the culprits at the earliest. The injured persons who have been getting treatment at Gauhati Medical College and Hospital and in some other hospitals are stable and the chief minister’s legal advisor Santanu Bharali who visited the injured persons at the hospitals has assured free treatment for those injured. Meanwhile, the local media has reported that ULFA is behind the blast. The self-styled Commander in Chief Paresh Baruah has been quoted by some local media as claiming the responsibility and targeting the central forces.