Polish President Andrzej Duda said on Friday he has no doubts that terrorism is linked to migration.

Duda was speaking in Malta during a meeting of the so-called Arraiolos Group, which brings together presidents from EU member states.

Duda said: "There is no doubt that the growing wave of terrorism is linked to migration."

He was speaking as a bomb blast injured 22 people on a rush-hour commuter train in London on Friday, in what the British authorities were treating as a terrorist attack.

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