A leak has shut down the Trans Niger Pipeline (TNP), one of the largest pipelines in Nigeria.
Shell confirmed to Reuters that the pipeline suffered a leak but the company has not commented on the cause.
No spills or injuries have been reported.
A source close to the matter told Reuters that the line could be offline for at least a week, shutting down about 130,000 barrels per day of production.
The leak comes just as Shell finished repair work on the Nembe Creek Trunk Line, Reuters said.
The Nembe line was shutdown in early May after a leak was discovered.
The TNP transports around 180,000 barrels of crude oil per day to the Bonny Export Terminal and is part of the gas liquids evacuation infrastructure that is critical for domestic power generation and liquefied gas exports.
Shell Petroleum Development Company is the joint venture operator of an unincorporated JV with a 30 percent interest in the TNP.
Nigerian National Petroleum Corporation holds a 55 percent stake, Total E&P Nigeria holds a 10 percent and Nigerian Agip Oil Company holds a 5 percent stake.
Oil and gas production in Nigeria has been disrupted by a wave of militant attacks since May.
The Forcados 48″ exportline, operated by Shell Petroleum Development Company, was attacked by the Niger Delta Avengers earlier this month.
At the time of the attack, work was being conducted on the line to repair damage caused by an attack in Feburary.
No causalities, injuries or spills were reported.
Nigeria is the largest crude producer in Africa but militant attacks, theft and sabotage have disrupted as many as 500,000 barrels per day of production this year.