The Manchester United Supporters Trust has backed Sir Alex Ferguson's call for an end to chants mocking the Munich air crash and Hillsborough disaster.
United again emphasised manager Ferguson's desire to end such taunting, after a small number of supporters sang "Always the victim" at Old Trafford during United's 4-0 win over Wigan.
The song highlights a perception among some United supporters that Liverpool refuse to accept responsibility.
And while some fans have tried to say it relates purely to Patrice Evra's spat with Luis Suarez last season, for others that view of the Merseysiders goes back to the Heysel tragedy in 1985 and has in the past included Hillsborough.
A United spokesperson said the club "deplore" such songs. In a statement, United said: "The manager has made the club's position very clear on this matter. It is now up to the fans to respect that."
With United due at Anfield next Sunday, the chants are sure to heighten tensions. And MUST attempted to calm the situation with a statement of their own.
MUST chief executive Duncan Drasdo said: "Following this week's developments and release of revelatory information on the Hillsborough tragedy, MUST wishes to make it absolutely clear that just as we condemn chants mocking the Munich air disaster we also condemn any chants relating to Hillsborough or indeed any other human tragedy.
"We did hear the usual anti-Liverpool chants at the match today but we're pleased to say, despite some reports to the contrary, there was nothing that was specifically referencing Hillsborough.
"Any attempt to suggest otherwise is irresponsible given the forthcoming fixture between the clubs and furthermore risks needlessly upsetting the bereaved families further at a time when they are understandably trying to find closure.
"We agree 100% with the statement made by Sir Alex Ferguson - this is the time for supporters of these two great clubs to represent their clubs with the integrity and honour that our glorious history demands."