(REUTERS) - Manchester United could be facing charges after Uefa announced that it would be investigating reports of illicit chanting during their Europa League tie against Liverpool.
Only Liverpool were initially charged with illicit chanting even though both clubs were subjected to disciplinary proceedings by European football's governing body following incidents that took place during the tie.
"Uefa has recently been made aware of several reports concerning alleged illicit chanting on the occasion of the Uefa Europa League ties between Liverpool FC and Manchester United FC of 10 and 17 March 2016," Uefa said in a statement.
"As a result, a Uefa ethics and disciplinary inspector decided to investigate further and gather potential evidence.
"The two clubs have thus been asked to provide statements relating to the alleged incidents within 10 days."
The European meetings between the clubs was marred by vile chants about the 1958 Munich air crash - which killed 23 people including eight United players - and the Hillsborough disaster in which 96 people lost their lives during the 1989 FA Cup semi-final between Liverpool and Nottingham Forest.
The Merseyside club advanced to the Europa League quarter-finals following a 3-1 aggregate win over United. Liverpool will next face manager Juergen Klopp's former club Borussia Dortmund.