NATO forces have bombed several targets near Muammar Gaddafi's home town of Sirte which is southeast of Tripoli.
The nearby town of Bani Walid was also hit which, rebels say, is a possible hideout for the fugitive leader.
They have said that they hit 37 targets around pro-Gaddafi held territory in Libya.
Warplanes have been bombing Gaddafi forces near Sirte, and the alliance has assured its Libyan allies it will keep up its military drive from the air in an attempt to end the conflict.
A NATO spokesman said yesterday that it was now focusing on the "the corridor between Bani Walid and the eastern edge of Sirte".