The official spoke on condition of anonymity because he was not authorized to speak to the press. Since the summer, militias have closed Tobruk's main al-Hariga terminal and four other oil export terminals in the country's east, demanding semi-autonomous status for the region that produces the majority of Libya's oil. Libya's heavily armed militias, many made up of former rebels who fought against former dictator Moammar Gadhafi, have proliferated since the 2011 civil war that ended with the dictator's ouster and death. [...] they have undermined successive transitional governments and parliament.