The decision, which was reached unanimously at a meeting of the Turkmenistan-Afghanistan-Pakistan-India (TAPI) steering committee in Ashgabat by ministers from the four countries was relayed by the country's state news agency.
"The state concern 'Turkmengaz' in its capacity as leader of the consortium for the Pipeline Company 'TAPI Limited' will oversee coordination in the construction, financing, ownership and operation of the TAPI pipeline," the agency announced.
A Turkmengaz official speaking to AFP on condition of anonymity said the decision did not mean foreign companies could not participate in a project with costs estimated at around USD 10 billion.
Previously Western energy majors such as Chevron, ExxonMobil and Total had been reported as potential leaders of the TAPI consortium.
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The TAPI pipeline seeks to connect growing energy markets in South Asia with the mostly untapped potential of Turkmenistan, a country with the fourth largest reserves of natural gas in the world.
TAPI is expected to ship up to 33 billion cubic metres (bcm) of gas annually from Turkmenistan, most of which will be absorbed by India and Pakistan with Afghanistan importing smaller amounts.
Turkmenistan began exports of gas to China in 2009 and aims to export up to 65 bcm there annually by 2020, but by 2018 may face competition from a rival pipeline scheduled to carry 38 bcm annually from Russia to China.