Anti-aircraft fire was heard in Libya's capital Tripoli early Sunday morning, hours after Western nations launched their first air strikes against Libyan defences and began enforcing a no-fly zone, dpa reported.
Explosions had also been heard in Tripoli, US broadcaster CNN reported, though it was not clear whether this was the result of any more missiles fired by Western fighter jets or ships.
The anti-aircraft fire lasted about 10 minutes, according to British broadcaster BBC.
An international military effort began late Saturday to impose a no-fly zone and prevent Libyan leader Moamer Gaddafi from engaging in a brutal crackdown against civilians and anti-government forces.
The United States and British ships fired some 110 Tomahawk cruise missiles at more than 20 Libyan air defences in Tripoli and Misrata, while French and British planes patrolled the skies over the eastern rebel stronghold of Benghazi.