Crude oil oozed into U.S. wetlands Friday as furious Louisiana officials accused BP of destroying fragile marshes and leaving coastal fishing communities in ruin.

As delicate marshlands in the Mississippi Delta faced an environmental nightmare, BP conceded after days of pressure that it had underestimated the amount of oil leaking into the Gulf of Mexico from the site of its oil rig. Thick patches of oil are tarring coastal Louisiana marshes, a haven for migratory birds and rare wildlife that will be virtually impossible to clean up.

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