The Libyan capital is surrounded by rebel forces.
After days of heavy fighting, key towns and cities across the west of the country have now been won.
The next big battle could now be Tripoli itself.
Brega, to the east appears to be the latest town to be taken, after Muammar Gaddafi's forces retreated from the oil refinery there.
In the west, the rebels are 50 kilometres from the capital Tripoli in the centre of Az Zawiyah.
Zlitan to the east of the capital has fallen to the rebels as well.
Here's the latest from Al Jazeera's Zeina Khodr in Az Zawiyah and Andrew Simmons in Zlitan.