Two terrorists were killed in an explosion while installing roadside bomb here on Monday. Sources said that two terrorists of a banned outfit were engaged in installing bomb by roadside in Dher Ke area of Bajaur Agency aimed at a terror bid when the bomb suddenly went off with big bang. As a result of explosion both terrorists were killed on the spot and their bodies split into several pieces. The security forces cordoned off the area after the incident and started search operation for the militants.