Shell shuts leaking Gulf drill rig
Royal Dutch Shell has shut down a drilling rig off the coast of Alabama after about 7,600 gallons of synthetic and biodegradable drilling fluid leaked.
Shell said the leak was not from a well on the ocean floor - that is what happened in the massive 2010 BP oil spill.
This drilling site was in the same Mississippi Canyon region as the BP spill and is some 7,300 feet deep.
The US Coast Guard said the problem was reported on Sunday and that the leaking line was connected to a vessel supplying the drilling fluid. It said more than half of the leaking fluid was oil.
The Southern Environmental Law Centre says the drilling is part of an exploration plan challenged in court.
Shell says US government environmental officials approved a plan to temporarily stop drilling and make repairs.