Celtic are facing a nervous wait to find out whether their fans will be allowed to attend their next away game in UEFA competition.
It comes after the travelling supporters at Villa Park were seen throwing a flare onto the pitch despite prior warnings.
After fans used pyrotechnics in a 7-1 defeat away at Borussia Dortmund earlier in the Champions League this season, the Parkhead side were given a one-match suspended ban over the possibility of away supporters being locked out should a similar incident occur in the next two years.
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Last night's happenings, therefore, sparked concerns that supporters could miss out on a potential trip to Munich or Madrid in the knockout stages of the Champions League, with Celtic set to discover their next European opponents in tomorrow's play-off draw.
Whether fans will be allowed into the away leg of the tie remains to be seen, with the BBC reporting that UEFA are awaiting the results of their match delegate's report from Villa Park.
The use of pyrotechnics is 'likely' to be noted, and the fan ban could resultantly come into play if Celtic are found guilty.
UEFA are also expected to investigate banners and chanting from the match.
Celtic return to domestic action this weekend, with a trip to face Motherwell in the Scottish Premiership in the offing on Sunday.
