After the Om and PAOK incidents on the sidelines of the match, the European football institution decided to react.
UEFA opened a disciplinary investigation on Friday against Olympique de Marseille and PAOK Thessaloniki after incidents between supporters of the two clubs on the sidelines of their quarter-final first leg of the Europa League Conference on Thursday.
Against OM, the European body retains the throwing of projectiles, smoke, crowd movements, and the blocking of public passages, all breaches of the safety rules provided for by its disciplinary code.
Against the Greek club, beaten 2-1, UEFA will investigate the throwing of objects, the use of smoke, damage, and crowd movements, and will make a decision “in due course,” said its statement.
As early as Wednesday evening, incidents took place in Marseille between Greek fans and OM fans. They continued on Thursday before kick-off, then inside the Velodrome Stadium.
Greek fans threw projectiles and seats onto the pitch, while PAOK and OM fans threw smoke and firecrackers at each other over the safety nets.
Marseille fans also launched fireworks in the direction of the Greek parking lot, and powerful explosions of firecrackers sounded. A brief crowd movement took place at the bottom of the corner, and the police intervened with tear gas in the direction of the Greek fans.
A dozen people were arrested, and the police prefecture evoked about thirty injured police officers on Thursday evening, most of them slightly.
On Friday, UEFA also opened a disciplinary investigation against Atlético Madrid, after its quarter-final loss to Manchester City (1-0) in England, for discriminatory behavior and throwing projectiles.