19 March 2011
Last updated at 16:57
World leaders committed to enforcing a no-fly zone over Libya have met in the French capital, Paris, as French jets went into action over Libya.
UK Prime Minister David Cameron accused Col Gaddafi of breaking his word about observing a ceasefire, and said the time had come for the international community to take urgent action.
Britain, the US, France and Arab countries are readying their forces for action. Here, fighter jets are placed on standby at Nato's Aviano air base in Italy.
On the ground in Benghazi, rebels appeared to have had some success repelling an earlier assault by Colonel Gaddafi's forces.
Reports that pro-Gaddafi forces had been pushed back spread around the city and rebels fired in the air in celebration.
Earlier, the city had been under heavy fire and pro-Gaddafi tanks were seen inside the city.
One jet - apparently a rebel fighter plane - was reportedly shot down over Benghazi. The pilot, seen here to the left of the plane, ejected before it hit the ground. Correspondents say the chances of surviving after such a late ejection are slim.
Dramatic pictures captured the last moments of the aircraft as it hurtled into the ground.
In Tripoli, protesters took to the streets showing support for their leader. Col Gaddafi warned Western leaders they would regret any intervention in his country and said the UN resolution authorising the action was invalid.