NAWALPARASI: One person was killed on the spot and two others injured when two trucks collided head-on at Chormara of Nawalparasi district on Mahendra Highway on Friday. The killed person has been identified as Bir Bahadur Kumal, a native of the Naya Belani village development committee, according to the Kawasoti area police office (APO). The mishap occurred when a truck bound for Butwal from Narayangarh and another heading towards Narayangarh from Butwal collided head-on, police said.