Officials confirmed that the oil spill was caused by a rupture in a section located at Tokebeleu, near Ojulagha, Delta state. Loading of all oil was immediately suspended. The Forcados terminal has a capacity of 400,000 barrels of crude oil a day, a full quarter of Nigeria's average export over the past few years. A joint investigation conducted by Shell, Seplat Petroleum Development Co. and the Nigerian National Petroleum Corp. determined that the cause of the export line leak was sabotage. The drop in oil prices , combined with a national budget predicated on energy production, makes the shutdown a huge blow to Nigeria's already depleted revenues. The Niger Delta Avengers also claimed to have attacked the Bonny Soku Gas Export Line the week of Feb. 8.