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Faiez Sarraj’s warning comes after Spanish police linked the catastrophic terror attack in Barcelona which claimed the lives of 15 people to radical North African groups.

The head of the UN-supported Libyan government Mr Sarraj said: “When migrants reach Europe, they will move freely.

“If, God forbid, there are terrorist elements among the migrants, a result of any incident will affect all of the EU.”

Almost 98,000 migrants are believed to have entered Italy from Libya in the last year.