UEFA has opened disciplinary proceedings against FC Copenhagen after the Danish club's fans set off fireworks during their 1-0 Champions League defeat against Leicester.
Leicester will not be punished despite hosting the match at the King Power Stadium.
European football's governing body has been cracking down on the use of fireworks, flares and smoke bombs by supporters, with Celtic, Liverpool and Manchester City among the clubs recently fined or warned for breaching regulations on pyrotechnics.
A statement posted on UEFA's official website said FC Copenhagen had been charged for "the setting off of fireworks - article 16 (2) of the UEFA disciplinary regulations" on Tuesday night.
UEFA's control, ethics and disciplinary body will hear the case on Nov. 17.