Marseille (AFP) – French police used water cannon and tear gas on football fans amid ugly incidents in Marseille ahead of the Euro 2016 match Tuesday between Ukraine and Poland, an AFP reporter said.

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”.