Fans were forced onto the pitch prior to Lyon's Europa League match against Besiktas after projectiles were thrown between the sets of supporters.
Kick-off in the quarter-final first leg was delayed as fans sought refuge on the pitch of Parc Olympique Lyonnais. The match eventually kicked off at 21:50 local time – 50 minutes late.
Lyon tweeted out a picture of the scenes with the caption: "Projectiles and fireworks launched from the top of the stands require supporters to seek refuge on the pitch."
— Olympique Lyonnais (@OL) April 13, 2017
With the players on the pitch for warm-ups, travelling Turkish fans and home supporters began to clash. UEFA spokesman Pedro Pinto tweeted that the game would be delayed due to "crowd disturbances".
— Pedro Pinto (@PedroPintoUEFA) April 13, 2017
The scenes followed earlier clashes in the city between the sets of supporters.