Fighting continues in western Libya

Libyan rebels have made significant advances over the past several days, launching a two-pronged offensive in the west to try and cut off supply routes between Tunisia and Tripoli.

They say that they are now in control of Gharyan, home to a large government military base, as well as Surman and Ajaylat, both towns on the coastal highway.

The key fight, however, continues in Az Zawiyah, a town 50km from the capital that is home to Gaddafi's last remaining oil supplies in western Libya.

Rebels say they entered the city on Saturday night, but that they are continuing to meet fierece resistance.

Al Jazeera's Zeina Khodr reports from Az Zawiyah, western Libya.