Assam police say it has almost cracked the bomb blast case which occurred in Guwahati last night. <br />'' <br />'' Informing this Commissioner of Police, Guwahati,  Deepak Kumar said today that two persons including a ULFA  terrorist have been arrested today.  <br />'' <br />'' He said that  2 to 3 more miscreants are involved in the case and police investigation is on to nab them. <br />'' <br />'' He said that those arrested today have been working as Sleeper Cell of the banned ULFA in Guwahati. Mr Kumar said that police also recovered gun powder, pistol and other explosives in the raid conducted today at Panjabari area in Guwahati. 12 persons were injured in the blast last night.