Spain has installed a 500-meter containment barrier on the sea border between its North African territory of Ceuta and Morocco. This follows a massive breach where 50,000 to 60,000 migrants crossed the frontier between Thursday and Friday. At least 67 migrants died in the journey. Some drowned or were killed in a stampede. On Saturday, some migrants who swam to Ceuta were escorted back by soldiers. Spain's interior ministry says most have returned to Morocco. Spanish Interior Minister Fernando Grande-Marlaska emphasized cooperation with Morocco in resolving the situation. Ceuta's President Juan Jesús Vivas noted the city remains unsettled.