Nigerians have been advised not to engage in panic buying of fuel as measures are being put in place to ensure constant adequate supply.The Nigerian National Petroleum Corporation, NNPC, said it would increase the February supply of petroleum products by providing six additional PMS cargoes of 37,000 tonnes each.The move, among others, is part of measures to sustain supply of Premium Motor Spirit (petrol), Automotive Gas Oil (diesel) and Dual Purpose Kerosene (DPK) nationwide.