Tensions rose on 11 July 2002, when Morocco occupied the island. Twelve Moroccan marines landed on the island, equipped with light arms, a radio, and several tents. The soldiers raised their nation's flag and set up camp. A patrol boat of the
Spanish Civil Guard, in charge of
coast guard service in Spain, approached the island from
Ceuta during its routine check, when the crew spotted the Moroccan flag flying. The officers disembarked to investigate the issue. When they landed on the island, they were confronted by the Moroccan soldiers, who forced them back into their boat at gunpoint after a bitter argument. Morocco claimed that the occupation was carried out in order to monitor illegal immigration, and to fight drug dealers and smugglers who use the island as a logistic platform. Following protests and calls to the return of the status quo from the Spanish government, the marines were called off, but were replaced by twelve soldiers of the
Royal Moroccan Gendarmerie, who set up a fixed base on the island, which drew further protests from Spain. A Moroccan patrol boat was also deployed to the area, and was seen carrying out maneuvers near the
Chafarinas Islands. Spain reacted by deploying a frigate, three corvettes, and a submarine to
Ceuta and
Melilla, and three patrol boats to the vicinity of Perejil island, stationing them about a mile off the island. Reinforcements were also sent to isolated Spanish outposts in the area. Spanish Prime Minister
José María Aznar warned Morocco that Spain would not accept a policy of
fait accompli. ==Operation Romeo-Sierra==