Racist accusations that a banana was thrown onto the pitch, aimed at Manchester City’s Gael Clichy, are being investigated by police.
The Blues full-back was the target of the malicious gesture during the Premier League champions 4-0 win at Limerick yesterday.
And Irish police are examining CCTV footage from Gardai and Thomond Park as the Frenchman was victimised – but his club are yet to make an official complaint.
The City defender Tweeted: "How sad to see 'bananas thrown on the pitch' tonight... Knowing people around the world need food. No words for this."
The First Division side stated that any fan found guilty of being involved in the incident will be banned from all of the club’s matches and that they are determined to identify the culprit.
A spokesman for the club said: "The Gardai and stadium officials are reviewing the CCTV recordings to attempt to identify an individual involved in the throwing of an offensive object onto the playing field.
"Any individual identified as being involved in an incident of this nature will be banned from future attendance and the matter will be handed over to the Gardai.
"All those involved with the friendly game fully condemn all forms of unacceptable behaviour of this nature."