FILE - In this Feb.26, 2021 file photo, Brahim Ghali, head of the Sahrawi Democratic Arab Republic and the Polisario Front, poses in the refugees camp of Tindouf, southern Algeria. Brahim Ghali was released from a hospital in northern Spain following more than six weeks of treatment after contracting COVID-19, according to a brief statement sent to the Associated Press by the self-declared Sahrawi Democratic Arab Republic. Ghali has long fought to break the Western Sahara away from Moroccan rule. (AP Photo/Fateh Guidoum, File)

This photo provided by the Algerian Presidency shows Algerian President Abdelmadjid Tebboune, left, visiting Brahim Ghali on his hospital bed in Algiers, Wednesday, June 2, 2021. Brahim Ghali, the leader of a movement seeking independence from Morocco who is at the center of a diplomatic row between Rabat and Madrid flew out of Spain to Algeria on Wednesday. (Algerian Presidency via AP)

This photo provided by the Algerian Presidency shows Algerian President Abdelmadjid Tebboune, left, visiting Brahim Ghali on his hospital bed in Algiers, Wednesday, June 2, 2021. Brahim Ghali, the leader of a movement seeking independence from Morocco who is at the center of a diplomatic row between Rabat and Madrid flew out of Spain to Algeria on Wednesday. (Algerian Presidency via AP)

An aircraft carrying on board Polisario Front leader Brahim Gali takes off at the Pamplona airport, northern Spain, Wednesday, June 2, 2021. Bharim Ghali, leader of a movement seeking independence from Morocco who is at the center of a diplomatic row between Rabat and Madrid flew out of Spain to Algeria on Tuesday night, his group said. (AP Photo/Alvaro Barrientos)

An aircraft carrying on board Polisario Front leader Brahim Gali takes off at the Pamplona airport, northern Spain, Wednesday, June 2, 2021. Bharim Ghali, leader of a movement seeking independence from Morocco who is at the center of a diplomatic row between Rabat and Madrid flew out of Spain to Algeria on Tuesday night, his group said. (AP Photo/Alvaro Barrientos)

An aircraft carrying on board Polisario Front leader Brahim Gali takes off at the Pamplona airport, northern Spain, Wednesday, June 2, 2021. Bharim Ghali, leader of a movement seeking independence from Morocco who is at the center of a diplomatic row between Rabat and Madrid flew out of Spain to Algeria on Tuesday night, his group said. (AP Photo/Alvaro Barrientos)