Crucial test starts on cap at BP's leaking oil well

HOUSTON (Reuters) - BP Plc on Wednesday started a crucial test on its ruptured oil well in the Gulf of Mexico that it hopes will lead to halting the flow of crude that has polluted the sea and shoreline since April.

HOUSTON (Reuters) - BP Plc on Wednesday started a crucial test on its ruptured oil well in the Gulf of Mexico that it hopes will lead to halting the flow of crude that has polluted the sea and shoreline since April.

Kent Wells, BP's senior vice president of exploration and production, said undersea robots working a mile below the surface had started shutting a sequence of three valves in a capping device installed on Monday.

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