Assam Chief Minister Sarbanand Sonowal has ordered the Director General of Police to conduct an inquiry into the Guwahati blast. <br />''<br />''Condemning the blast, the Chief Minister said that culprits must be arrested soon. 12 persons were injured in the grenade blast in Guwahati last night. <br />''<br />''Most of the injured persons are stable now. Senior police officials said that motor cycle-borne miscreants hurled grenade at Zoo Road area. <br />''<br />''Among injured, 2 are SSB personnel, deployed near a security picket. Several ministers, DGP and Guwahati Police Commissioner visited the blast spot and hospitals where injured people are being treated. <br />''<br />''<span style="color: #222222;">DGP Kuladhar Saikia said that police investigation is on. Guwahati city is on following the blast. Banned outfit ULFA (Independence) claimed the responsibility of the blast. </span>