Oil workers in Nigeria are threatening a nationwide strike over pay.<br /><br />Their employers say the government owes them over $2.5bn for bringing petrol into the country, and they say they will not pay salaries until that bill has been settled.<br /><br />But the Nigerian authorities say some of the claims by these oil companies are fraudulent.<br /><br />Al Jazeera's Yvonne Ndege reports from Lagos.
