UEFA is investigating the pointing of a laser at the key moment of England's Euro 2020 semifinal win over Denmark on Wednesday.
Denmark goalkeeper Kasper Schmeichel had the laser shone in his face as England captain Harry Kane stepped up to take an extra-time penalty.
Schmeichel saved the penalty, but Kane pounced on the the rebound and his goal proved decisive in a 2-1 win which ensured England's passage to Sunday's final against Italy.
European football's governing body said it had opened disciplinary proceedings, charging England with the use of a "laser pointer by its supporters."
UEFA said its disciplinary investigation will also look at the "disturbance" caused by England supporters during the national anthem and the lighting of fireworks by its fans.
Broadcaster ITV, which televised the match in the U.K., showed footage of a green laser being pointed at Schmeichel's face.
"Whoever they are they're an idiot ... it's stupid and he doesn't deserve that," ITV presenter Mark Pougatch said. "That sort of thing, nobody wants to see."
The English Football Association and the Danish Football Union did not immediately respond to CNN Sport's request for comment.