Libyan military planes have attacked an opposing force that is seeking to seize the country's two biggest oil ports, according to Reuters.
The rebel force, which is allied to a rival government based in Tripoli, moved in an attempt to try take the Es Sider and Ras Lanuf ports.
The terminals have therefore been closed, halting all oil exports.
After the airstrikes, no casualties have been announced.
The fighting is reportedly part of a struggle for control of the North African country which sits on Africa's largest oil reserves after the ousting of prvious leader Muammar Gaddafi.
The UN is said to be preparing for talks to ease the crisis.
Libyan Rebels in Port Coup. (Source: France24)