KARACHI: The Oil Tankers and Contractors Association (OTCA) has announced the countrywide strike for an indefinite period from Thursday to protest against the increase in income tax, provincial service and toll taxes. OTCA President Abid Afridi announced to cut off oil supply to the entire country after the government failed in resolving their issues. Afridi said their sector worked 24 hours and continued oil supply across the country during the coronavirus pandemic.