Unknown armed men gunned down a Customs clearance officer on Monday and escaped the scene. Unknown armed men opened fire at vehicle of Customs Officer Malik Muhammad near Ghatt Gujran Jhang Branch Canal killing him on the spot and fled the scene. The deceased officer hailed from Upper Mall Road, Lahore and he was serving at Lahore Dry Port. The family sources said that Malik Amjad visited Hafizabad to purchase a vehicle and reasons of the incident were not clear. Police said that evidences have been collected for further investigation.