ABUJA, Sept 17 (Reuters) - Nigeria militants said on Wednesday they attacked another Shell-operated <RDSa.L> oil flow station in the Niger Delta and threatened to sabotage offshore oilfields in their "oil war" against the energy sector and military. The Movement for the Emancipation of the Niger Delta (MEND), responsible for attacks that have cut a fifth of the OPEC member's oil output, said it attacked the Orubiri flow station in Rivers state. "Soldiers and oil workers are advised to abandon all oil facilities including the offshore rigs of Bonga and Agbami as we want to minimize casualties," the group said in an e-mailed statement. (Reporting by Randy Fabi; Editing by Catherine Evans)
