Dundee United have been fined £13,500 for crowd disturbances and a pitch invasion during their Europa League tie against Dinamo Moscow in August.
United chairman Stephen Thompson said: "It is extremely disappointing that the actions of a few individuals have imposed this financial penalty."
Clashes between rival fans began just after the start of the game.
"We are working alongside Tayside Police to identify the individuals involved in the crowd disturbance," added chairman Stephen Thompson.
"And the person who encroached on the pitch has already been notified of a life-time ban."
Tayside Police said three fans had been arrested and seven ejected from the ground on the night.