The Movement for the Emancipation of the Niger Delta (Mend), has threatened to take up arms again, saying the Nigerian government has not stuck to its side of a ceasefire agreement.
The group's fighters laid down their weapons as part of a government-led amnesty deal in return for a promise of cash and jobs.
But with the president out of the country for medical treatment the deal has virtually collapsed.
Al Jazeera's Yvonne Ndege reports from the Niger Delta.
Content on this website is for general information purposes only. Your comments are provided by your own free will and you take sole responsibility for any direct or indirect liability. You hereby provide us with an irrevocable, unlimited, and global license for no consideration to use, reuse, delete or publish comments, in accordance with Community Rules & Guidelines and Terms and Conditions.