Military and security sources in Nigeria say an explosion has occurred at an oil facility in the country's oil-rich southern delta.
The blast took place late Tuesday night at a facility in Bayelsa state.
There is little information about the explosion, or any casualties that might have occurred.
The blast follows a recent threat of attacks by the Nigerian militant group Movement for the Emancipation of the Niger Delta.
MEND says it will soon carry out bomb attacks at oil installations and other locations across the country. It also warned people to stay away from political gatherings.
Officials say it is unclear whether the threat and the blast are related.
MEND has spent years sabotaging Nigeria's oil industry, but many of its members surrendered their weapons in 2009 under a government amnesty program.
Some militants have continued to fight, saying they want a more equitable distribution of oil wealth in southern Nigeria's Niger Delta region.
Article by VOA News