Celtic have been fined £13,000 by Uefa for fans throwing balls on to the pitch during the Europa League tie at home to Stuttgart last month.
The disruption shortly after kick-off caused a delay of more than three minutes in the knockout play-off first leg, which Celtic lost 4-1 before exiting the tournament 4-2 on aggregate.
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It was the latest in a sequence of protests from Celtic fans this season against the club’s board.
Interim manager Martin O’Neill criticised the first-leg disruption post match, saying: “Anyone who thinks that is a good idea needs their head examined.”
Meanwhile, Stuttgart have been fined £19,500 by Uefa for “transmitting a message that is not fit for a sports event” during the second leg.