The U.S. Coast Guard is responding to a crude oil spill reportedly discharged from a Shell subsea well-head circulation line, roughly 90 miles south of Timbalier Island, Louisiana, Thursday.

The Coast Guard says an estimated 88,200 gallons was reportedly launched from the pipeline and that the supply of the discharge has been reported as secured.

Marine Spill Response Corporation and Clean Gulf Associates have been contracted by Shell to start clear up and containment operations.

The U.S. Bureau of Safety and Environmental Enforcement (BSEE) can also be concerned within the response. The company stated a two mile by 13 mile sheen was noticed within the space of its Glider Field, a gaggle of 4 subsea wells situated in Green Canyon Block 248. The manufacturing from these 4 wells flows via a subsea manifold to Shell’s Brutus platform situated in 2,900 toes of water.

A Coast Guard plane is conducting an aerial evaluation of the location and surrounding areas.

“The likely cause of the sheen is a release of oil from subsea infrastructure and, in response, Shell has isolated the leak and shut-in production at both fields,” Shell stated in an announcement. “At this time, Shell estimates that 2100 barrels of oil were released. There are no drilling activities at Brutus, and this is not a well control incident. Shell is determining the exact cause of the release by inspecting the subsea equipment and flowlines in the Glider field. The company has made all appropriate regulatory notifications and mobilized response vessels, including aircraft, in the event the discharge is recoverable. There are no injuries.”

BSEE will lead the incident investigation.