Spain has installed a 500-metre-long sea barrier between its North African enclave of Ceuta and neighbouring Morocco. It comes after tens of thousands of migrants breached the border earlier this week, with at least 67 people dying in the attempt. While most of those who crossed quickly returned to Morocco, the incident has reignited the immigration debate in Europe and beyond. The EU is due to hold an emergency video conference on the issue on Tuesday. Charlotte Hughes reports.