The official news agency JANA said the explanations were contained in a letter from Egyptian Foreign Minister Amr Moussa to his Libyan counterpart Omar al-Montasser briefing him on the results of his contacts with France, Italy, Spain and Portugal. The force, constituted last November by the four countries, will be able to call on up to 10,000 troops and has its command headquarters in Florence, Italy. It will be made available to the 10-nation Western European Union and can also be put at the disposal of NATO and the United Nations for peacekeeping and humanitarian reasons, the countries involved have said. Libyan leader Muammar Gaddafi has called it "international terrorism", and Egypt wrote to the foreign ministers of the four European countries to seek an explanation. "Introducing the south Mediterranean in the operations zone means that it was part of its plan to invade North Africa," Montasser said.