The Associated Press
A supply vessel passes through an oil sheen Monday near the site of the Deepwater Horizon oil spill in the Gulf of Mexico near the coast of Louisiana.

NEW ORLEANS (AP) -- A doctor says 11 workers who have been out on the Gulf of Mexico cleaning up oil from BP's blown-out well have
been treated for symptoms that could be related to the oil.

Dr. Damon Dietrich says he has seen patients come through his
emergency room at West Jefferson Medical Center with respiratory
problems, headaches and nausea.

All were treated and released.

He says 11 people coming in with the same symptoms make him
suspicious.

BP and U.S. Coast Guard officials have said dehydration, heat,
food poisoning or other unrelated factors may have caused the
workers' symptoms. The Louisiana Department of Health and Hospitals
is investigating.