Negotiations to free eight foreign workers abducted from an oil rig in the Niger Delta are progressing well, government officials have said. President Olusegun Obasanjo has joined in the mediation efforts and his spokeswoman said he was optimistic the men would be freed unharmed. Six Britons, a Canadian and an American were seized on Friday from an offshore rig in the south of the country. Militants in the region are seeking more local control of oil wealth. Full Story