Thousands of migrants leave after crossing into Spanish territory of Ceuta

Migrants return to Morocco from the Spanish enclave of Ceuta on Friday (Antonio Sempere/AP)

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.