NATO warplanes bombarded targets in Tripoli with more than 20 airstrikes early Tuesday, striking around Moammar Gadhafi's residential compound in what appeared to be the heaviest night of bombing of the Libyan capital since the Western alliance launched its air campaign against his forces.

The rapid string of strikes, all within less than half an hour, set off thunderous booms that rattled windows, sent heavy, acrid-smelling plumes of smoke over the city, including from an area close to Gadhafi's sprawling Bab al-Aziziya compound.

Government spokesman Moussa Ibrahim said at least three people were killed and dozens wounded in NATO strikes that targeted what he described as buildings used by volunteer units of the Libyan army.

NATO said in a statement that a number of the strikes hit a vehicle storage facility adjacent to Bab al-Aziziya that has been used in supplying regime forces "conducting attacks on civilians." It was not immediately clear if the facility was the only target hit in the barrage. Bab al-Aziziya, which includes a number of military facilities, has been pounded repeatedly by NATO strikes.

The military aircraft whooshed low over the city during the last  night. Government spokesman Moussa Ibrahim said at least three people were killed and dozens wounded in NATO strikes that targeted the buildings used by volunteer units of the Libyan army.