Witnesses say bombs have landed near Libyan leader Muammar Gaddafi's compound on Friday morning in the capital, Tripoli.<br /><br />Reports suggest NATO is behind the attacks.<br /><br />The opposition says it is advancing in the western mountains around the capital.<br /><br />Opposition forces said they had seized a military base in Gharyan, located on a main government supply route, and the oil refinery in Az Zawiyah - a key source of fuel supplies to the capital, and the last major barrier before they advance on Tripoli.<br /><br />Al Jazeera's Zeina Khodr reports from Gharyan.
