The pipeline explosion followed on from two other security incidents
Royal Dutch Shell on Tuesday closed two oilfields in Nigeria's oil-producing Niger Delta following a dynamite attack carried out by gunmen on a pipeline it operates, the company said in a statement.
Some 170,000 bpd net oil have been deferred, the company said.
It said the closure was the aftermath of an explosion on a crude oil pipeline belonging to the SPDC across the Opobo Channel, 50 km south-west of the southern oil city of Port Harcourt in the early hours of Tuesday.
"Preliminary investigations reveal that the fire may have been caused by a dynamite attack carried out by unknown persons," it said. The sabotage resulted in a major spill and fire.
The pipeline explosion followed on from two other security incidents: an attack by unknown gunmen on a security post at Fisiokiri in its Cawthorne Channel field, and another attempted attack on a liquefied natural gas tugboat within the same period.