Liverpool, Manchester City and Celtic have all been fined by UEFA for incidents in recent Champions League matches.
Liverpool were fined £8,500 for "field invasion by spectators" after a couple of fans ran onto the pitch both during and at the end of their game at home to Red Bull Salzburg.
And City have been ordered to pay £13,500 for the throwing of objects by their fans in the home match against Dinamo Zagreb earlier this month.
The punishments were handed out by UEFA's control, ethics and disciplinary body.
Celtic have also been fined £10,400 after their fans set off fireworks in the Europa League encounter with Cluj earlier this month.
This is the second such fine the Parkhead club have received this season after they were punished for fans setting off flares and throwing objects during the 4-1 Europa League play-off second-leg win over AIK in Stockholm in August.
Celtic have since urged their supporters to stop using pyrotechnics and vowed to introduce further measures to prevent a repeat of such behaviour.
They will resume their European campaign at home to Lazio on October 24 before heading to Rome for the return match on November 7, when a partial stadium closure will be enforced after the Italian club were charged by UEFA over
alleged racist chanting from supporters during their 2-1 Europa League victory over Rennes.