Red Star Belgrade fans have been banned from attending their Champions League tie at Liverpool.
Uefa have acted after a pitch invasion and firework-throwing in Red Star's play-off triumph at Red Bull Salzburg.
Red Star supporters are now barred for their first two group trips, at Paris Saint-Germain on October 3 and Liverpool exactly three weeks later.
Belgrade are the rank outsiders in a group that also includes Serie A runners-up Napoli.