Four blasts shook the Libyan capital at around 2:30 am (0030 GMT) Sunday, according to an AFP journalist who was unable to identify the targets.
Earlier, two powerful but distant blasts were felt in the centre of the capital at around 6:30 pm (1630 GMT) Saturday, followed by several others a few minutes later.
Witnesses said the explosions came from Tajura, a suburb that has often been targeted by NATO since an international coalition began military operations against Libya on March 31 to stop strongman Moamer Kadhafi attacking civilians.
Residents of Tajura, most of whom support the rebels, said they were not sure what the raids had targeted but that they could see plumes of black smoke and that aircraft were still circling over the area.
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