Marseille police use water cannon against fans

Several people were seen being detained.

The troubles heightened tensions among supporters massed at a roundabout near the Marseille stadium, causing shoving and many to run in panic. 

Four people were arrested earlier Tuesday in the Vieux-Port area that was the scene of violent clashes between Russia and England supporters on June 11. Thirty-five mainly British fans were injured then, two seriously.

Thousands of Poland supporters gathered in the district before heading towards the Velodrome stadium, behind a huge banner reading "Defenders of European Culture".