UEFA is investigating several Real Madrid players, including Kylian Mbappe and Vinicius Junior, for allegations of "indecent conduct" during the Champions League Round of 16, European soccer officials said Thursday.

Kylian Mbappe and Vinicius Jr are among four Real Madrid players at risk of being banned for their Champions League quarter-final against Arsenal after UEFA launched an investigation into their alleged “indecent conduct”.

UEFA is investigating four Real Madrid players over allegations of “indecent conduct” during their Champions League win over Atletico Madrid. The current holders needed a penalty shoot-out to see off Atletico in the round of 16.