Petrol and diesel prices were hiked across the four metro cities on Sunday, July 4, according to data released by the Indian Oil Corporation (IOC). In the national capital, petrol prices are gradually inching towards the century mark as they were hiked by 35 paise to stand at Rs 99.51 per litre. Diesel prices too were hiked by 18 paise in the national capital to reach Rs 89.36 per litre.