The Premier League is unlikely to take action following brief anti-Liverpool chanting during Manchester United's top-flight win over Wigan Athletic.
United's biggest win of the season was marred by a short burst of anti-Liverpool chanting from a small minority of home fans following this week's damning report on the handling of the Hillsborough disaster in 1989, in which 96 people died.
The report laid bare a shocking cover-up which attempted to shift the blame for the tragedy on to its victims, revealing that South Yorkshire Police had instructed officers to change or amend their statements relating to the tragic events.
One clearly audible chant at Saturday's game at Old Trafford was "Always the victims, never your fault", believed to be in reference to the report findings.
However, the song has been sung since Liverpool striker Luis Suarez was found guilty of racially abusing United defender Patrice Evra last season, which saw the Uruguay international given an eight-game ban and a £40,000 fine.
It is understood the Premier League deems the chants to be unacceptable but believes it is a matter for the clubs themselves to deal with.
There is a history of sour relations between the two sides. A minority of United fans have directed chants to Liverpool fans regarding Hillsborough and a Liverpool minority have chanted in reference to the Munich air disaster of 1958 in which 23 people died.
A United spokesperson said the club "deplore" such songs and, in a statement, the club said: "The manager (Sir Alex Ferguson) has made the club's position very clear on this matter. It is now up to the fans to respect that."
The Football Association declined to comment on the matter on Sunday.
The tension between the two rival clubs is sure to be heightened when United travel to Anfield next Sunday.