Chairman of the Governing Board of Thar Coal Project, Dr Samar Mubarakmand, on Sunday said four more coal wells had been set on fire and as a result gas production from these would begin from next week. Talking to a private TV channel, he said a flame would be lit from gas as emission began from these wells towards the end of this month. Dr Samar said through underground gasification technology, electricity could be generated at Rs 3 to Rs 4 per unit while diesel could be produced at $40 per barrel. The average rate of power production through furnace oil came to Rs 20 per megawatt, he added. He said as much as 50,000MW of electricity a day could be generated through Thar Coal reserves. Mubarakmand said a number of foreign companies, including those of China, had expressed interest to invest in Thar Coal Project.