A Kathmandu-bound Toyota Hilux collided head-on with an oil tanker at Jogimara along the Prithvi Highway on Saturday, killing one and seriously injuring two others. Police identified the deceased as Rambabu Sah, 53, of Mirchaiya in Siraha district. The injured were rushed to the Capital for treatment. All three victims were the passengers on the Hilux. Police detained drivers of both the vehicles for investigation.