Two people have been stabbed during trouble at the Irish Cup Final at Windsor Park in Belfast.
Glentoran supporter with blood streaming from a cut head
The police were called in to restore order after disturbances in the North Stand which was holding Glentoran fans during the match on Saturday afternoon.
A man arrested and taken to hospital was released on Sunday pending further police inquiries.
He was arrested for grievous bodily harm with intent and for having an offensive weapon. He has minor injuries.
Glentoran won the match against Coleraine by one goal to nil.
Alliance sports spokesman Michael Long condemned the incident.
Mr Long, who was sitting in the North Stand where the incident occurred, described the disturbances as "highly regrettable given the generally good atmosphere at the game".
He expressed fears that it would damage the reputation of local football.