Oso field managed by Mobil Production was attacked. Hostage taken. Facility already shutting down.
This happen yesterday evening around 10 pm

But it was unclear whether there were any injuries or damage.

The site was a deep offshore facility off the coast of Akwa Ibom state, in Nigeria's Niger Delta region.

The attack would be the second of its kind in as many weeks off Akwa Ibom state.

Militants attacked a rig operated by exploration firm Afren in the region a week ago, kidnapping two Americans, two Frenchmen, two Indonesians and a Canadian.

That attack was claimed by the Movement for the Emancipation of the Niger Delta (MEND), the main militant group in the region, which has warned of further strikes against energy facilities.