AN oil spill is threatening the central African coast off the Angolan enclave of Cabinda, local government said on Wednesday. A large oil-slick has hit the Atlantic waters near the port of Futila, killing large quantities of fish, a local fisheries official said. The local administration said the spill resulted from operations by US oil company Chevron. A spokesman of the Cabinda Gulf Oil Compagny (CABGOC), a subsidiary of Chevron, said on Wednesday that the spill, comprising more than 40 barrels of crude oil, has been detected and contained, and that cleanup operations have begun.