UEFA has opened disciplinary proceedings against Celtic following Wednesday's UEFA Champions League Group D match against AC Milan in Glasgow.
The Scottish club will have to answer charges of "lack of organisation and improper conduct of supporters" after a fan invaded the pitch and lightly tapped Milan goalkeeper Nelson Dida.
The supporter, who has now handed himself in and banned from all Celtic games for life, invaded the pitch after Scott McDonald’s late strike handed Celtic a surprise 2-1 win over the Rossoneri.
Dida, who initially gave chase to the intruder, collapsed to the floor and was taken off on a stretcher holding an ice pack to his face. UEFA are seeking clarification from the European champions on the exact reason for the goalkeeper's substitution.
The Control and Disciplinary Body will deal with Celtic's case at its next plenary meeting on 11 October.
Source: C4 Football Italia / UEFA