Chelsea have been quick to issue a statement condemning a 'very small minority' who did not honour the moment's silence before their FA Cup semi-final.
Before the game with Tottenham at Wembley, fans and players alike were asked to observe a moment's silence in memory of the Hillsborough disaster and also for Italian footballer Piermario Morosini who died on Saturday.
A small section of fans in the Chelsea end did not honour the silence and the club have now issued a statement condemning that behaviour.
"Chelsea Football Club is extremely disappointed that a very small minority of fans embarrassed the club today by not honouring the moment's silence before kick-off," read the statement.
"Chelsea FC believes all moments of respect should be honoured and today we pay our full respects to all those that suffered as a result of the Hillsborough disaster 23 years ago."
Chelsea's interim manager Roberto Di Matteo was disappointed with the fans' actions.
He said: "We are extremely disappointed that a minority, or just a few, decided to speak or sing during the minute's silence and not respect it. We are disappointed."
It is understood that Chelsea will work with Wembley and the Football Association to try to identify the fans responsible.