 On 10 February 2003, the Polisario liberated 100 POW's on request from the Spanish government.In April 2003, the France Libertés foundation led an international mission of inquiry on the conditions of detention of Moroccan prisoners of war long held by the Polisario Front in the Sahrawi refugee camps of Algeria and in the "Liberated Territories" of Western Sahara.The prisoners (under Red Cross supervision since the 1980s) had been held since the end of hostilities, awaiting the conclusion of a formal peace treaty, but as the cease-fire dragged on over a decade, many prisoners had at this time been held between 15 and 20 years, making them the longest-serving POWs in the world.