Libya on Monday stopped a North Korean-flagged tanker that had loaded oil from a rebel-held port, after naval forces briefly exchanged fire with the rebels, officials said. They also said the government will assemble forces to “liberate” all occupied ports, raising the stakes over a blockage that has cut off vital oil revenue. The conflict over oil wealth is increasing fears that the OPEC producer may slide deeper into chaos or even splinter as the fragile government fails to rein in dozens of militias that helped oust Muammar Gaddafi in 2011 but now defy state authority. The rebels, who have seized three ports and partly control a fourth in the North African country, said they had dispatched forces to central Libya to deal with any government attack. Prime Minister Ali Zeidan told Reuters naval forces had seized the North Korean-flagged tanker outside the eastern Es Sider […]