The Nigerian oil industry is facing another significant set-back, with workers from the Anglo-Dutch multinational, Shell, going on strike in the Niger Delta.
They are protesting at feared job cuts as the result of a new restructuring plan for the company.
Oil production has been affected by unrest
The oil industry in Nigeria is already suffering from major losses in output over the past months as a result of community unrest in the oil-producing regions of Nigeria.
But this latest problem may just turn out to be a simple misunderstanding.
Staff locally employed by Shell strongly believe that a newly-rolled-out "exploration and production globalisation plan" will lead to job losses.
Posts, they believe, will be filled by ex-patriate staff.
This, says Shell, is an unfounded rumour and they say that this will be explained clearly to the white-collar union, Pengasson.
Shell have made it quite clear production has not so far been affected by this latest dispute.
But clearly the company is under a great deal of pressure at the moment as a result of local unrest and direct threats against oil installations by local militia groups over the past few months.
A substantial part of their operation in the western Niger Delta have already been shut down, and staff have been evacuated for their own safety.
And the government has now sent a large army contingent to the area to quell the unrest.
At a conservative estimate, at least 200,000 barrels are currently being lost from production every day in Nigeria as a result of the instability.
And industry analysts believe that a further 100,000 barrels are lost each day due to theft from the pipelines.