Ugly scenes marred the end of a pulsating match at the City Ground
Nottingham Forest and Derby County have been fined by the Football Association for the post-match confrontation which marred their league game in August.
Forest, who pleaded not guilty to a charge of failing to control players and officials, have been fined £25,000 - of which £10,000 is suspended.
The Rams, who pleaded guilty to the same charge, have been fined £20,000 - half of which is suspended.
Forest's Nathan Tyson was handed a two - game suspended ban and a £5,000 fine.
The forward had pleaded guilty to an FA charge of improper conduct in the aftermath of his side's 3-2 victory on 29 August.
The commission found this incident to be both unsavoury and avoidable
FA commission chief Peter Powell
Following the final whistle, Tyson ran across the pitch waving a corner flag.
He was confronted by Derby's players, and a large section of players and staff from both teams then become involved in a tussle.
Commission chairman Peter Powell said: "The commission found this incident to be both unsavoury and avoidable which was caused in the outset by the actions of a professional footballer who on this occasion behaved naively and below the level that would have been expected.
"Such action, particularly in relation to a high-profile local derby, caused a safety issue to the general public which simply should not have happened.
"The regulatory commission however recognised the subsequent, immediate acceptance of the charge as they did in relation to the acceptance of the charges by Derby County.
"The commission recognised the exemplary record of both clubs which is the main reason for part of the sanctions being suspended and would hope that both clubs do all within their power to ensure no such incident is repeated in the future."
Forest, Derby and Tyson were all warned about their future conduct.
All suspended sanctions will be automatically activated if those involved are found guilty of similar offences before the end of the 2010/11 season.
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