The Greek holiday island of Kos was turned into a battlefield on Tuesday as hundreds of migrants clashed with police and were sprayed with fire extinguisher foam, and the mayor warned the situation was “out of control”.

Over 7,000 illegal immigrants have arrived on Kos this summer, sailing across from Turkey and pouring onto the isle of 30,000 people. Camping rough or sleeping in disused hotels and on beaches, the migrants yesterday were taken to a sports stadium for identification. But the registration process turned into a stampede, with migrants chanting “We want our papers,” and the police driving back the crowd with white foam. One woman passed out.

“This situation on the island is out of control,” said Giorgios Kyritsis, mayor of Kos. “There is a real danger of uncontrollable situations. Blood will be shed.”