Fierce fighting near Tripoli as rebels close in

Rebel forces in Libya have clashed with troops loyal to Col Muammar Gaddafi about 80km (50 miles) south-west of the capital, Tripoli.

A rebel spokesman in the Nafusa mountains said there had been heavy fighting on the outskirts of the strategic town of Bir al-Ghanam.

Mark Doyle reports from the mountains of western Libya.