NATO nations have stressed they are united over their main goal in Libya as foreign ministers met in Germany amid disputes over the alliance’s future involvement in the North African country. US Secretary of State Hillary Clinton said on Thursday that NATO members are "sharing the same goal, which is to see the end of the Gaddafi regime in Libya." "We are contributing in many ways to see that goal realized," she said after meeting German Chancellor Angela Merkel, whose country is not taking part in the military operation and abstained in the UN vote authorizing it. The German leader echoed Clinton, stressing that Gaddafi`s retirement would help the development of freedom in his country. The statements come as NATO demands that Gaddafi returns his troops to their barracks. The alliance regards it as a necessary condition for a stable ceasefire. The effort to enforce a no-fly zone over Libya was yet another issue topping the foreign ministers` agenda at the two-day meeting. It has been almost four weeks since the first air strikes on Gaddafi forces` positions. On Thursday, Gaddafi`s anti-aircraft units allegedly attacked the coalition`s bombers in response to the resumed strikes on Tripoli. Meanwhile, in Misrata 23 people are reported dead following Gaddafi forces` morning attacks. French officials, together with the UK, called for Washington to do more to ensure the mission`s success, but the Obama administration insists the US will stick to its plan to remain in a supporting role. Also, members of the alliance discussed what contribution each state needs to make, with only six out of the 28 involved conducting air strikes. The UK and France have been calling on other countries to increase military pressure on Colonel Muammar Gaddafi. Clinton is reported to have stressed the importance of using NATO military assets to go after pro-Gaddafi fighters attacking or approaching rebel-held positions and stepping up economic and political pressure on Gaddafi. The foreign ministers of the US, Britain, France, Germany and Italy - a group known as the Quint - also plan to meet on the sidelines in Berlin with a focus on Libya.