Tens of thousands of migrants who crossed into Spain’s tiny Ceuta territory returned voluntarily to Morocco on Friday, a day after the influx triggered chaos in the North African city and reignited the immigration debate in Europe and beyond. At least 57 migrants died on the journey.

Thousands of migrants have entered the Spanish territory of Ceuta from Morocco, prompting local officials to seek help from Spain's national government

The border has now been reinforced and tens of thousands of people have since reportedly returned to Morocco voluntarily.