A pressure test of BP's undersea well that has kept fresh oil from gushing into the Gulf of Mexico will be allowed to continue for another day, despite concerns about potential new problems near the well, the government official overseeing the spill response said Monday.

Late Sunday, the government ordered BP to step up monitoring of the well after "undetermined anomalies" were discovered on the seafloor nearby. The government's top official in the Gulf response, retired Coast Guard admiral Thad W. Allen, said that government scientists had talked late Sunday with BP about a seep and the possible detection of methane around the well.

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