Forces loyal to Muammar Gaddafi today pounded the besieged western town of Misurata amid growing differences among the international community over the military campaign in Libya.Ahead of a key NATO meeting in Berlin, Britain and France mounted pressure on the alliance to help defeat the Libyan regime. French President Nicolas Sarkozy and British Prime Minister David Cameron agreed on a heightened military pressure against Gaddafi during a working dinner in Paris last night. Only six out of NATO's 28 members are taking part in the air strikes. Key members like Spain and Italy are reluctant to be involved in the bombings on Gaddafi's forces. Libyan rebels said heavy fighting is continuing in Misrata, where Gaddafi's forces have been trying to dislodge them with heavy bombardments and street attacks for weeks. They said at least 13 people were killed and some 50 hurt in attacks by pro-Gaddafi troops.NATO said it had attacked munitions bunkers 13km from the Libyan capital, while Libyan TV reported other air strikes in the Libyan cities of al-Aziziya, Sirte, and Misrata.