Spain has installed a floating barrier off its North African enclave of Ceuta after a mass influx of migrants, most of whom have now returned to Morocco. Spanish authorities said 50,000 migrants who entered the territory have crossed back across the border. At least 67 people died trying to enter, according to authorities. The floating barrier was set up following the surge, which pushed large numbers of migrants into the Spanish territory. The return of most migrants to Morocco appears to have eased the immediate pressure on Ceuta, though the deaths highlight the dangers faced by those attempting the crossing. Spanish officials have not provided further details about the barrier or the circumstances of the deaths.