US oil giant ExxonMobil plans to export Nigerian Qua Iboe crude oil through a secondary pipeline while it repairs damage sustained by the main line in July, Reuters reported.

The crude oil grade, Nigeria’s largest export stream, has been under force majeure since mid July, when the company said it detected a “system anomaly” on the subsea pipeline. Exxon later found extensive damage that would take one to two months to repair.

According to Yahoo Finance, Exxon has said there was no militant involvement in the Qua Iboe line, nevertheless, the Niger Delta Avengers had claimed an attack on the pipeline days before the force majeure was announced.

Nigeria’s oil production has been disrupted by militant actions since early 2016, with production reduced by almost 700,000 b/d, down from typically above 2mb/d. In addition to Qua Iboe, crude oil streams Forcados and Brass River are also under force majeure, while Bonny Light and Escravos exports have been hobbled by pipeline closures.