In Assam, one person was killed and another five persons injured in a grenade blast at Rail Station road in Udalguri district this evening. The SP of Udalguri Debojit Deuri said that police recovered another live grenade from the spot. The injured persons were admitted to nearby hospital. No organization has claimed responsibility of the blast so far. Security forces cordoned off the area and launched a massive manhunt to nab the culprits. This is the grenade blast in Lower Assam within a week. One person was killed another three injured in grenade blast on Wednesday in Chirang district. Various civil society organizations condemned the incident.