Pro-Gaddafi troops have launched a fresh attack on the rebel-held city of Misrata in western Libya. Reports say there had been rocket attacks. A spokesman for the rebels said, 12 of their fighters had been killed. He told Reuters news agency from inside the city that Gaddafi forces are shelling Misrata from three sides. The latest attack came as NATO intensified its campaign in Libya and called for international community to prepare for a post-Gaddafi era. The government has so far not commented on the latest attack. Meanwhile, NATO ministers met in Brussels on Wednesday to discuss the alliance's nine-week campaign. After the meting, NATO's Secretary General, Mr. Anders Fogh Rasmussen told newsmen that real progress had been made. Mr. Rasmussen said, NATO action, had prevented a massacre in Benghazi in the east – the rebels' stronghold – and in the rebel-held city of Misrata in the west. He said the UN and the other international bodies should start preparing for a post-Gaddafi Libya.