A statement from the governor's office in the eastern Turkish province of Agri said the Wednesday attack on the pipeline was the result of attacks by "separatist terrorist organization's members."
Militant activity from the Kurdistan Workers' Party, or PKK, is on the rise in 2010, with the militant group launching attacks on Turkish military bases in recent months.
The explosion Wednesday struck a pipeline that carries gas from the Iranian border to the Turkish town of Dogubayazit near the eastern border with Iran.
Officials from Turkey's state-owned pipeline operator BOTAS said the blaze was under control but it could take as long as six days to resume operations, CNN International reports.
The official Anatolian Agency said authorities were shifting reserve gas capacity from nearby Azerbaijan to make up for the shortfall.