Article: "Avengers unite!"
The Niger Delta Avengers. This mysterious group is blowing up pipelines in southern Nigeria and impacting oil exports (down by half a million barrels per day since the attacks started).
Nigeria’s government is nearly completely dependent upon oil revenues for its funding. A few years ago, the last group that tried this got bought off by the government with a monthly stipend (likened to the Danegeld). World oil prices are rising as a result of the attacks and their interruption to the flow of oil.