Migrants continued to leave from Spain’s Ceuta enclave back to Morocco with security forces accompanying them to El Tarajal border crossing.
Spain said migrant crossings into its North African enclave of Ceuta stopped overnight, as police began installing a 500-meter (1,640-foot) floating barrier off its border with Morocco following a mass rush that killed at least 67 people.
Reuters video on Sunday showed some migrants still arriving across the sea despite the new control measures.
According to Spanish authorities, about 50,000 people had crossed into Ceuta by land and sea from Thursday in an unprecedented surge at one of the European Union's only land borders with Africa.
More than 48,000 of them returned to Morocco within 48 hours, Spain said.
Civil Guard police laid a new floating barrier on Saturday on the Tarajal breakwater, one of the main points used by people trying to enter the tiny Spanish territory.
The pneumatic barrier, alongside a line of anchored naval buoys, is designed to stand 30 to 70 centimeters (12 to 28 inches) above water and extend as much as one meter below the surface, it added, while a channel between the barriers will allow Civil Guard vessels to patrol the area.
The mass crossing prompted alarm across the European Union, and 22 member states wrote a letter asking for coordinated action to protect external borders and other measures.