CNN reports:

An oil sheen about four miles long has appeared in the Gulf of Mexico near the site of the worst oil spill in U.S. history, a Coast Guard spokesman said Thursday.

It was not immediately clear where the oil is coming from, said Petty Officer 3rd Class Ryan Tippets.

Coast Guardsmen went to the location after seeing the oil on a satellite image, Tippets said. The response team collected samples and sent them to the Coast Guard Marine Safety Lab in Connecticut for testing.

... The sheen is near the spot where, on April 20, 2010, BP’s Deepwater Horizon drilling rig exploded over the Macondo well, killing 11 workers and spewing oil that spread across a huge portion of the Gulf.

As we've noted...

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