An explosion on a Gulf of Mexico oil production platform off the coast of Louisiana is likely to renew attention to the safety of offshore oil-and-gas development.

Ensign Glenn Sanchez, a Coast Guard spokesman, told The Hill that two people are missing from the Black Elk Energy platform and possibly overboard. He did not confirm reports of the two deaths.

Nine people have been taken to a Louisiana hospital, Sanchez said, adding that the Coast Guard has multiple boats and two helicopters at the scene.

He said there is a sheen of oil visible in the area that could be from a broken line that contained 28 gallons of oil.