Leeds United defender Junior Firpo has been suspended for three games for allegedly headbutting a Millwall opponent in an off-the-ball incident during a midweek game in England’s second-tier Championship.

The English Football Association said Saturday that the ban was imposed because Firpo’s actions constituted “violent conduct.” He had denied the allegation.

The alleged headbutt was in the 95th minute of Wednesday’s game with Leeds trailing 1-0. After a shot goes out of play, Firpo appears to strike Millwall defender Danny McNamara.

“The defender’s behaviour around the 95th minute wasn’t seen by the match officials but was caught on video, and the FA alleged that it constitutes violent conduct,” the governing body said in a statement.

“Junior Firpo denied the charge against him, but an independent regulatory commission subsequently found it to be proven and imposed this suspension.” The Dominican Republic international will begin serving his suspension on Saturday when third-place Leeds hosts Queens Park Rangers.