President Ferdinand Marcos ordered a ceasefire on Sulu, Palawan, and Mindanao islands on February 26, 1971. Sixty-one Muslims were killed by Christians in North Cotabato on Mindanao island on June 19, 1971. Libya provided financial and military assistance to the MNLF from July 1971 to 1976. Some 100 individuals were killed in religious violence in Lanao del Norte province on September 2-4, 1971. Some 35,000 fled as refugees from six towns as a result of the violence. Some 75 individuals were killed in religious violence in Zamboanga del Sur province on July 4-6, 1972. On July 6-9, 1972, Egypt and Libya sent a four-member fact-finding mission to the Sulu, Palawan, and Mindanao islands to investigate allegations of genocide. Some 30 individuals were killed in religious violence in southern Mindanao island on August 22-26, 1972. President Marcos declared martial law on the Sulu, Palawan, and Mindanao islands on September 23, 1972. Some 2,000 individuals, mostly Muslims, were killed during the crisis. Some 100,000 individuals were displaced during the crisis.