Nigeria: Gunboats exchange fire with oil militants

Nigerian gunboats exchanged fire with militants in the western Niger Delta on Friday, security sources and a prominent ethnic activist said, the latest sign of deepening unrest at the heart of Africa's biggest oil industry. More than a dozen navy gunboats opened fire on militants along Chanomi Creek in Delta state, the sources said. The region is home to U.S. energy giant Chevron's Escravos export terminal and Nigeria's 125,000 barrels per day Warri refinery.