Emergency boats work to put out a fire at the Kab 121 oil platform belonging to the Mexican state-owned oil company PEMEX, in the Gulf of Mexico, Mexico, Wednesday, Nov. 28, 2007.

Since a drilling rig slammed into a production platform Oct. 23, killing at least 21 workers, a total of 11,700 barrels of oil, about 420 a day, have seeped into the gulf, Pemex Assistant Director for Exploration and Production Pedro Silva Lopez told reporters invited to fly over the site with company and environmental officials.

Pemex previously estimated the spill at nearly 13,000 barrels.