The search is still on for missing workers after an oil explosion in the Gulf of Mexico

WEST COTE BLANCHE, LA - One day after an explosion ripped through an oil platform in the Gulf of Mexico, the Coast Guard scoured the region Saturday for any sign of two missing crew members.

The explosion triggered a fire and injured at least 11 people.

The incident occurred about 20 miles off the coast of Grand Isle, Louisiana, on a platform used for production, not drilling. Black Elk Energy, a Houston-based firm, was in charge of the platform.

About 28 gallons of fuel spilled into the region, according to Coast Guard Response Division Chief Ed Cubanski. A half-mile oil sheen reportedly stretched near the area.

The injured were airlifted and nine additional crew members were safely evacuated, according to the Coast Guard.

Four of the injured were being treated at Baton Rouge General Medical Center in Baton Rouge, Louisiana.

Of the four, two are in critical condition, said Jeffrey Littleton, a burn surgeon and chief of surgery. The other two are in serious, but stable, condition.

All four suffered major burns and the next 48-72 hours are critical, said Littleton.