Manchester United have avoided UEFA sanction for supporters' chants about the Hillsborough disaster during Thursday's Europa League clash with Liverpool.
Last week was the first ever European meeting of the English giants - the first leg of a last-16 tie which Jurgen Klopp's men won 2-0 at Anfield.
The match was somewhat overshadowed by unsavoury chants from the away end, with sections of the travelling support heard singing about the Hillsborough disaster on several occasions.
A crush during the 1989 FA Cup semi-final between Liverpool and Nottingham Forest, in which 96 people were killed, was the subject of chants referencing media coverage at the time.
However, a UEFA spokesperson has confirmed United will not be punished for the incident.
The chanting was not mentioned in the match officials' reports, additional reports included, so no disciplinary proceedings have been opened as a result.
Manchester United condemned the chanting on Friday and said the club were in discussion with fans' groups ahead of the second leg.
"It has always been the position of Manchester United that chants of this nature, which refer to historical tragedies, have no place in the game and do not reflect the values the club holds," the statement read.
"We are in discussion with our fans' groups to seek their support in preventing this type of behaviour in the future."
Merseyside Police said on Friday it had yet to receive any complaints about the songs that ex-United striker Dion Dublin called "disgusting" and former Liverpool midfielder Ray Houghton labelled "dreadful".
Thursday's chants from the away end were also reported to have focused on the Heysel disaster, when 39 fans died before the 1985 European Cup final between Juventus and Liverpool.
This is not the first time that vile songs have been heard during this fixture, with some Liverpool supporters having previously sung about the Munich air disaster that claimed 23 lives as United flew back from a European fixture in 1958.
It is understood that officials will be paying closer attention to chants when the teams meet for the return fixture at Old Trafford on Thursday.
UEFA charged Lazio for, amongst other things, illicit chanting on Friday after their last-16 first leg against Sparta Prague in the Czech Republic.
Van Gaal proud of players for keeping Cup dream alive
Meanwhile, United boss Louis van Gaal has said he is proud of his players for keeping their FA Cup dreams alive at the end of a "very nasty week".
A run of four successive wins in all competitions proved a false dawn for the Red Devils, with a 1-0 league loss at West Brom compounded by the 2-0 defeat at Liverpool.
Overturning that deficit will be a big ask in Thursday's return fixture, but United will go into it buoyed by Anthony Martial's late leveller in yesterday's quarter-final with West Ham.
The strike cancelled out Dimitri Payet's stunning free-kick at Old Trafford and secured a 1-1 draw, meaning a replay in east London will now decide who progresses to Wembley.
"For the first 15 minutes I think West Ham were the better team and they created a few chances, but after that we came back into the match," Van Gaal, hoping to end United's 12-year wait for FA Cup glory, said.
"We have created chances and in the second half we were the better team. They scored out of a free-kick. We were behind.
"We have played against West Brom and lost, and Liverpool and lost this week, and when you come back from that I think it is amazing, and fantastic spirit in the team, in spite of a very nasty week. I am very proud of my players. We are still in three competitions."
Martial's strike allowed Van Gaal to breathe a sigh of relief on an afternoon when it had looked like Payet's beautiful 25-yard free-kick would punish United's lacklustre display.
The Frenchman's exquisite strike was not without controversy, though, having escaped a second yellow card for simulation in the penalty area shortly before.
"Payet was, more or less, diving," Van Gaal said. "Of course, he was maybe touched but not to fall like that."
West Ham boss Slaven Bilic angrily rejected that claim, instead arguing that Irish goalkeeper Darren Randolph was impeded by Bastian Schweinsteiger when Martial equalised.
"A dive? Come on," the West Ham boss said. "If you have a screen, show me, I am going to defend my point at Cambridge if needed. There is more than a contact. It is definitely not a dive."
On the incident involving Schweinsteiger, Bilic said: "It was (a foul).
"I don't want to spoil the game talking about the referees - overall, he did a good job, but there have been a couple of situations, crucial ones, that have gone against us."
Martial's late goal means West Ham will now welcome United for a quarter-final replay - the last-ever cup match to be held at the Boleyn Ground before the summer move to the Olympic Stadium.
"In our dressing room after the game it was kind of silent," Bilic said.
"We are a little bit disappointed because we were there the last few minutes and the time when you conceded makes you a little bit down.
"But that is good. It shows you have confidence and are moving in the right direction."
