Eleven persons were injured in a bomb explosion this afternoon.The bomb went off at 3:30 pm while the office was crowded with service-seekers. Of the injured, accountant Rajendra Mahato and Shatrudhan Raut are in critical condition. All the injured are undergoing treatment in the Janakpur Zonal Hospital.The police said the 11 persons were injured when sharpnels hit them.Security has been tightened in the area after the explosion. Large number of policemen have been mobilised in government office and residences of chiefs of government offices here. We are on the lookout for those behind the blast, Dhanusha SP Madhav Joshi said. Meanwhile, Janatantrik Tarai Mukti Morcha-Rajan Mukti has owned up to the blast. The group has put forth four preconditions for talk with the government.Last night, cadres of the outfit had gunned down Ram Prakas Sahani, 40, of Chakkar 2 of Dhanusha.Two injured in Dang attackDang: Two persons were critically injured in a shooting at Rajpur VDC-1 Khahare, Dang, last night.The police said a gang attacked Rameshwor Yadav and Khote Ram Yadav of Rajpur-1 with guns and khukuri following a dispute and injured them seriously. Five persons were arrested on the charge of involvement in the incident.According to the District Police Office, Dang, Sher Bahadur Yadav’s son Ram Baran Yadav had forced Basanti, daughter of Shalik Ram Yadav, to marry him. Accusing the groom’s side of going for marriage without taking the bride’s side into confidence, the group shot at Rameshwor Yadav and thrashed Khote Ram Yadav, the police said. All the injured were rushed to Nepalgunj for treatment.