Le Havre fans attacked several Lens supporters at the Oceane stadium during Friday’s French league match between the two sides.
The violence broke out after a few Lens fans entered a section of the ground containing Le Havre fans, celebrating their side’s 92nd-minute goal – which was later disallowed for offside following a VAR review.
At least one of the Lens fans was wheeled out of the stadium on a gurney.
The game finished at 0-0.