LEEDS will hand lifetime bans to fans who threw missiles at Manchester United players.
And the FA have launched an investigation into Sunday’s disorder.
Anthony Elanga was floored by a coin when celebrating after Fred put the Red Devils back ahead on Sunday.
Elanga, 19, recovered to score the winning goal in Man Utd’s 4-2 win against their bitter rivals.
Nine arrests were made before and during the match, with two for flares being thrown and one for pitch invasion.
And a Whites spokesperson said: “Leeds United are reviewing CCTV footage and we will do everything possible to find those supporters who are throwing objects onto the field of play.
“Any supporter caught throwing objects onto the pitch will be issued a lifetime ban from attending our fixtures.”
In the biggest security operation in Premier League history, 900 police officers were on duty for Sunday’s bitter War of the Roses clash.
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Around 70 ticketless United supporters were issued with dispersal notices from Elland Road.
And the police said: “There was no significant disorder but there were a few incidents in Leeds City Centre ahead of the game and some minor incidents throughout the game.
“Officers were deployed in sufficient numbers to rapidly intervene to identify and arrest the people responsible and prevent any escalation in disorder.
“Approximately 70 away fans turned up without tickets. They were promptly issued with a Section 35 dispersal notice and escorted away from the ground.
“There were no reported injuries to any players or fans on either side.”
The FA are still investigating similar incidents in the games against Brentford and Burnley before and after New Year.
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