UNB: A man was killed and three others were injured in a private car gas cylinder explosion on Dhaka-Aricha highway at Nayarhat here on Thursday. The deceased was identified as car driver Shamim, a resident of Nayarhat. Quoting witnesses, officer-in-charge of Savar Police Station Mohsinul Kabir said the cylinder went off while it was being refilled at Delta CNG filling station in the afternoon, leaving its driver dead on the spot and three passengers injured. The injured — Sajal, Amanat Shah and Nayan — were first taken to Savar Public Health Hospital and later shifted to Dhaka Medical College Hospital (DMCH) as their condition deteriorated.