Libya’s biggest oil port was seized by an armed group, dealing a blow to the North African country as it seeks to revive production of its most important commodity. Brent crude futures climbed. The Benghazi Defense Brigades, a militia that’s not allied to the United Nations-backed government in Tripoli, took control of the Es Sider terminal on Friday afternoon, according to people with knowledge of matter who asked not to be identified because they aren’t authorized to speak to the media. The facility had previously been under the control of eastern-based military commander Khalifa Haftar. “That is a considerable blow to Haftar,” said Mattia Toaldo, senior policy fellow at the European Council on Foreign Relations. “We have to see if there is an immediate impact on exports. But for confidence in Libya’s production it’s a blow.” The clashes show just how vulnerable Libya’s recent oil-production surge is to conflict […]