Just as Libya resumes oil exports from recently shuttered ports, an attack on its largest field is setting back progress yet again. Oil production at Libya’s Sharara field, the country’s largest, was resuming on 6 September after a valve was reopened on a pipeline shut by an armed group for more than 2 weeks, Libyan oil industry sources said. Two more oil fields in Libya are being closed after an armed group took over pipelines to both deposits, further disrupting the OPEC nation’s plan to boost crude production. Libya halted loadings from its biggest oil field in the latest disruption to the nation’s crude production and shipments. Libya’s biggest oil field, Sharara, is “back to normal” after a disruption caused by protests in the politically fragmented country, the state National Oil Corp. (NOC) said.