Libya: Rocket fire exchanged in Sirte fighting

There has been heavy fighting in the Libyan city of Sirte, where armed supporters of the transitional authorities are facing strong resistance from Gaddafi loyalists.

The BBC's Alastair Leithead says the two sides have been exchanging machine-gun fire, rockets and artillery shells.

Sirte remains one of the final strongholds of supporters of Colonel Gaddafi, with Bani Walid 250km (155 miles) to the west the only other major city holding out.