Anchorage (Alaska), Jan 10 (Agencies): The trans-Alaska pipeline remained shut for more than 24 hours after a leak was discovered at a North Slope pump station.

Alyeska Pipeline Service Co. said, “The leak was discovered on Saturday. It appears to be coming from a section of piping encased in concrete next to Pump Station 1 - the first pump station on the 800-mile pipeline.”

There is no estimate of how much oil has been spilled. Tom DeRuyter with the Alaska Department of Environmental Conservation said that the oil leaked into the station's booster pump building. In the meantime, North Slope production has been cut to five per cent.

DeRuyter further added that an estimated 90 per cent of the oil has been removed and a small cleanup operation was under way.