Pro- and anti-migrant protestors clash at cafe in Spain's Ceuta

Spanish authorities said migrant crossings into its North African territory of Ceuta had stopped overnight after a mass border rush that killed at least 67 people. Meanwhile, police began installing a floating barrier off Spain's border with Morocco.

Civil Guard started laying the pneumatic barrier at 7:50am Saturday local time on the Tarajal breakwater after around 60,000 migrants breached the frontier earlier this week.

Authorities say the 500-metre-long containment barrier, alongside a line of anchored naval buoys, is designed to stand 30 to 70 centimetres above water and can extend as much as one metre below the surface.

At a cafeteria in Ceuta, right-wing activists tried to stage a protest against the migration crisis on Saturday afternoon but had to cancel it after tense confrontations with a group of counterprotesters who chanted "I am Spanish."

People surrounded a cafe chain and were separated from the activists by a police cordon.

Alvise Perez, the leader of far-right Se Acabo La Fiesta political party, and other group members were led away by police.

Meanwhile, 21-year-old Moroccan Abdulah Buji explains why he crossed into Ceuta. "There are no opportunities there in Morocco," he said, "just sitting in your home or working for 12 hours for a lesser salary."

Moroccan agricultural worker Ikraa Khai who is working in Spain's Huelva said she arrived at the beach to search for her sister's son.

A handful of migrants who swam to the tiny Spanish enclave on that day were escorted back across the border by soldiers.

Spain's Interior Minister Fernando Grande-Marlaska says most of them have returned to their home country, emphasising cooperation with Morocco in resolving the situation.