From: Bruce Nichols and Anna Driver, Reuters
Published April 23, 2010 06:10 AM

Rig sinks in Gulf of Mexico, oil spill risk looms

An oil drilling rig that had burned for 36 hours in the Gulf of Mexico sank on Thursday as hopes dimmed for 11 missing workers and the risk of a major oil spill loomed, officials said.

The fire went out as the Deepwater Horizon, operated by Transocean Ltd, sank below the surface at 10:21 a.m. CDT (1521 GMT), about 42 miles off the Louisiana coast.

The rig was drilling BP Plc's Macondo project with 126 workers on board when it was ripped by an explosion and fire on Tuesday night. Some 115 workers escaped, including 17 helicoptered to New Orleans area hospitals with injuries.


Search and rescue operations turned up two empty lifeboats, and officials cited dim hopes that the 11 workers missing since the blast about 10 p.m. CDT Tuesday night would be rescued.

"We do continue with search and rescue activities," the 8th District Coast Guard Commander Rear Admiral Mary Landry said. "As time passes, however, the probability of success in locating the 11 missing persons decreases."

Transocean, based in Zug, Switzerland and the world's largest offshore drilling contractor, said some of the missing may not have been able to escape the rig.

"Based on reports of crew members, at the time of the incident, they believe they may have been on board and not able to evacuate," said Adrian Rose, a vice president of Transocean.

U.S. lawmakers called for the Coast Guard and Minerals Management Service to investigate the incident.

"It is critical that these agencies examine what went wrong and the environmental impact this incident has created," said Sen. Mary Landrieu, Louisiana Democrat.

The explosion comes almost three weeks after President Barack Obama unveiled plans for a limited expansion of U.S. offshore oil and gas drilling.

It was unclear whether the rig sank to the bottom in about 5,000 feet of water, or how much oil still flowed or had spilled from the well, officials said.

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