Nigeria's militant group, the Niger Delta Greenland Justice Mandate (NDGJM), has reportedly accused President Muhammadu Buhari of corruption, saying that his administration "cannot be trusted".

According to Naij, the group said this was the reason why it would not partake in a ceasefire called by other militant groups in the region.

Nigeria has been plagued with devastating attacks by militant groups since the start of the year.

Oil majors like Shell, chevron, Exxon, En and state-run Nigerian National Petroleum Corporation have been targeted.

The attacks have slashed output at a time when the west African country is struggling with low global crude prices which have hammered government revenues, weakening the naira currency and pushing up inflation to 16.5%, an 11-year high.

'Oppressive tendencies'

The militants want oil majors to leave the Niger, blaming them for contributing to widespread poverty and under-development of the region.

They also seek self-determination for the oil-producing states in the delta.

The NDGJM argued that the alleged insincerity of the Buhari led government was the reason why they refused to lay down arms.

They maintained that they would continue to attack oil pipelines until the government and oil firms ended their "oppressive tendencies".

"Until we see a sincere and genuine step towards a just and equitable mending of the injustices of all the years past done to our people, this war shall persist and we can guarantee that they cannot win this one, even if they get all the world’s arsenal assembled behind them," the statement read.