SAN JUAN, Puerto Rico — The U.S. Coast Guard on Saturday investigated a fuel spill off the tiny Puerto Rican island of Vieques, which is popular with tourists.

A mile-long sheen and a strong diesel odor was reported by local emergency medical officials on Friday afternoon along Sun Bay Beach, which is known for its clear, turquoise waters.

At least one person was exposed to the unknown substance and received treatment, the Coast Guard said Friday.

Authorities urged people to stay out of the water.

On the latest episode of "Sarra Sounds Off," Gregg talks with Michael Sicoli and Tess Ferguson about county champs crowned in boys and girls lacrosse, and Jared Valuzzi reports on the Long Island flag football championship. Credit: Newsday

Sarra Sounds Off Ep 36: Champs crowned in lax and flag football On the latest episode of "Sarra Sounds Off," Gregg talks with Michael Sicoli and Tess Ferguson about county champs crowned in boys and girls lacrosse, and Jared Valuzzi reports on the Long Island flag football championship.

On the latest episode of "Sarra Sounds Off," Gregg talks with Michael Sicoli and Tess Ferguson about county champs crowned in boys and girls lacrosse, and Jared Valuzzi reports on the Long Island flag football championship. Credit: Newsday

Sarra Sounds Off Ep 36: Champs crowned in lax and flag football On the latest episode of "Sarra Sounds Off," Gregg talks with Michael Sicoli and Tess Ferguson about county champs crowned in boys and girls lacrosse, and Jared Valuzzi reports on the Long Island flag football championship.

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