NATO has continued its almost daily bombardment of Tripoli, with another six explosions heard overnight, as Libyan leader Muammar Gaddafi has released an audio recording declaring that he is uninjured and will continue fighting.

Gaddafi's message, broadcast on Libyan state television, was apparently a response to an Italian government statement that he had likely left Tripoli and was injured.

Al Jazeera's Tony Birtley reports from the Libyan opposition stronghold of Benghazi.