Nato strikes cause 'most significant damage' yet

Nato aircraft have attacked Colonel Gaddafi's compound in the Libyan capital, Tripoli, badly damaging three buildings.

The Libyan authorities described the buildings as locations where the colonel held meetings.

Earlier, loud explosions were heard in Tripoli as Nato aircraft flew overhead. Three Libyan state television channels went off-air immediately afterwards but later resumed transmission.

The BBC's Ian Pannell sent this report from Tripoli.