Forces loyal to Libyan leader Col Muammar Gaddafi have launched further air strikes on the rebel-held oil port of Ras Lanuf, in a renewed offensive.
Warplanes have dropped missiles near rebel positions. There were no immediate reports of casualties.
Rebels fighting to oust Col Gaddafi after 41 years in power took Ras Lanuf on Friday.
Government forces launched a counter-offensive to beat the rebels back from the path to the capital, Tripoli.
