Oil transporters have announced that they will keep supplies suspended nationwide after their dialogue with high officials in Islamabad failed on Tuesday.The transporters have been on a wheel-jam strike since Monday morning in protest against implementation of oil transportation safety regulations introduced by the Oil and Gas Regulatory Authority (Ogra) in 2009.The continued strike is feared to create shortage of petroleum products at fuel stations nationwide.The National Highway Authority (NHA) is also among the authorities implementing the regulations as it checks the safety standards in oil tankers transporting flammable commodity from Karachi's ports to the upcountry.The Ahmedpur Sharqia oil tanker accident that occurred a day before Eid and killed over 200 people in a huge inferno in June 2017 - served as a wake-up call for the authorities that have become strict with the oil transporters.Oil Tankers Contractors Association President Babar Ismail told The Express Tribune in a telephonic conversation, “we have left the meeting in the middle after Ogra chairperson said they want to talk on the issue with oil marketing companies (like PSO, Shell and Hascol) instead of oil tankers' owners.”The Ministry of Petroleum and Natural Resources secretary had called all the stakeholders to his office in Islamabad to have dialogue on the issue and convince oil tankers’ owners to call off the strike.The stakeholders included Ogra, NHA, oil marketing companies and oil tanker owners’ representative bodies.“The Ogra chairperson was of the view that oil marketing companies were responsible for ensuring implementation of the regulations,” Ismail said.An official at Ogra said the industry had demanded five years to implement the regulations. However, the regulations remain unimplemented despite the fact that eight years have passed since the regulations were introduced.The regulations demand that tankers transporting oil should have four axles instead of three, it was learnt.