Nearly 88,200 gallons of oil leaked from a Shell flow line into the Gulf of Mexico about 90 miles off the coast of Louisiana.<br />The leak has been secured and cleanup crews will be dispached, said Chief Petty Officer Bobby Nash.<br />Officials were investigating the cause of the leak, but Shell spokeswoman Kimberly Windon said the likely cause is a release of oil from the subsea infrastructure.<br />The Bureau of Safety and Environmental Enforcement said there have been no reports of injuries.<br />Officials said Shell reported the spill and had shut the wells flowing into the line.<br />"We are working with the United States Coast Guard and the National Oceanic Atmospheric Association to define the best approach to contain and clean up the sheen," said Windon.