The U.S. Coast Guard has responded to a report of oil in Breton Sound near Venice, according to a press release Wednesday afternoon.

The Coast Guard was called around 7 a.m. Wednesday by fishermen in the area and told that there was an “oily substance” in the water about two miles southeast of Baptiste Collette Pass, according to the press release.

The Coast Guard and the Bureau of Ocean Energy Management, Regulation and Enforcement are investigating, but the source of the oily material hasn’t been found yet.

The Coast Guard has sent out four pollution investigators to the scene to collect samples and a helicopter crew from Air Station New Orleans is flying over the area.

Capt. Edwin Stanton, commanding officer of Sector New Orleans, is the federal on-scene coordinator for the investigation.

Oil Mop has been hired as the oil spill response organization to do any necessary cleanup work, the release says. Oil Mop has sent out three barge boats, two workboats and a containment boom trailer, which are currently on the way to Venice, according to the press release.

The Coast Guard is working with the Louisiana Department of Environmental Quality, the Louisiana Oil Spill Coordinator’s Office, BOEMRE and the U.S. Fish and Wildlife Service.

The release says more information will be released as it becomes available.