Royal Dutch Shell lifted its force majeure on Nigeria’s Bonny Light crude exports. The Nembe Creek Trunk Line was repaired and reopened, allowing Shell to resume exports, nearly a month after declaring force majeure due to a shutdown of the Niger Delta pipeline following a leak, Oil Price reported.

Nembe Creek is one of a handful of key pipelines that helps Nigeria brings its oil to the coast for export. The cause of the August outage was not reported. Pipeline operator, Aiteo, said it was from a leak but did not disclose the cause, according to Ecofin Agency Oil and Gas.

Bonny Light is Nigeria’s fourth oil grade placed under force majeure as the country battles with attacks by militant that have weakened oil production and exports. Previously, the country’s largest export stream, Qua Iboe, was placed under force majeure as well as the Forcados and Brass River. The country’s loss due to similar attacks has reached 700,000b/d of oil.