The spokesman for Libya's national oil company says militias in control of ports in the country's east are attempting to export oil independently with a North Korea-flagged tanker.

Mohammed al-Harari said Saturday that the vessel docked at al-Sidra could carry up to 350,000 barrels of oil. An oil company official, speaking on condition of anonymity because he was not authorized to brief reporters, said armed gunmen forced workers loyal to the government to dock the ship.

The spokesman for the militia, Abd-Rabbo al-Barassi, said that his group would respond to any attempt to stop the shipment. The militia has been demanding autonomy and a share of oil revenues, and has formed a shadow government.

Libya's oil exports have dropped drastically after the militia took control.