If Celtic are found guilty, the suspended sentence of a one-match ban for their away fans will be automatically imposed.
There could also be further punishment, but that will be determined by Uefa’s control, ethics and disciplinary body – with an outcome unlikely until next week.
Uefa is also likely to investigate banners and chanting from the match in Birmingham.
Celtic manager Brendan Rodgers was asked about the implications of the smoke bomb after the game but refused to be drawn on the subject.
The Scottish champions were already assured of a place in the play-off stage of the new Champions League format before their 4-2 defeat against Villa.
Celtic were drawn against Bayern on Friday, with the second leg at Allianz Arena on 18 or 19 February after a first leg in Glasgow the previous week.
Bournemouth manager Andoni Iraola believes it will be a "challenge" until the end of the season for the Cherries to qualify for Europe but any "small dip" would
The European Women's Football Championship this summer aims to set an example for diversity, equal opportunities and inclusion. (archive picture)
Napoli could demolish their historic stadium due to safety concerns surrounding 10,000 seats. A large portion of the Stadio Diego Armando Maradona has been clos
And it is about more than the type of profit on the balance sheet their debut campaign brought in last season. Albion showed a £20 million profit on a