Waving of the flags, done as a protest against Israel, is in defiance of disciplinary regulations laid down by European football’s governing body.
If included in the report from Uefa’s match delegate it is likely to incur further punishment to add to fines totalling more than £190,000 imposed on Celtic for supporter misconduct on 11 previous occasions since 2007.
Celtic defeated the Israeli champions by five goals to two and will be heavily favoured to reach the Champions League group stages following next Tuesday’s second leg.
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