The pipeline, one of two that carries Nigeria's Bonny Light crude to the coast for export, suffered a leak last month that prompted Royal Dutch Shell, which markets this oil grade, to declare force majeure on shipments on May 17.

"There was a shut-in on Friday," Aiteo said in an emailed statement.

Bonny Light is Nigeria's third-largest crude oil stream behind Forcados and Qua Iboe.

A Shell spokesman said earlier on Monday that the force majeure on Bonny shipments remained in place.