Catalans Dragons and Warrington Wolves have been fined for crowd trouble at their Super League fixture in Perpignan on August 3.
Fighting on and off the pitch marred a 30-10 victory for Catalans at Stade Gilbert Brutus.
Catalans duo Sam Tomkins and Michael McIlorum were shown red cards after a high tackle from the hooker sparked a series of altercations.
The Dragons have been fined £27,500 - £10,000 of which has been suspended until the end of the 2021 season - and must pay two thirds of the cost of a Rugby Football League (RFL) investigation.
Warrington have been hit with a £15,000 fine - a third of that suspended for two years - and must pay the remaining third of the costs of the investigation.
Both clubs have accepted the findings, with Catalans given a bigger fine due to inadequate match-day planning and stewarding provision.
RFL chief regulatory officer Karen Moorhouse said: "The behaviour of some of the supporters at this fixture was completely unacceptable and has no place in rugby league – importantly, both Catalans Dragons and Warrington Wolves have accepted that, and committed themselves to taking positive steps in response."
Warrington have issued two banning orders and a number of additional sanctions following the ugly scenes in the south of France.