The Pakistan State Oil (PSO) has temporarily suspended the fuel supply to many airlines including Pakistan International Airline (PIA) for the want of JP1 fuel, sources said. According to PSO sources, the fuel shortage hit due to the annual repair work on National Refinery, which will be completed soon but Shell and Caltex lubricants companies have been continuously providing fuel to airline. JP1 Fuel, stored for US and NATO forces in Afghanistan, is in use theses days , sources added.