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The Druids performing at Sunday's Ardoyne Fleadh
The PSNI are investigating comments made by a member of Kidare folk band 'The Druids' during their performance in Belfast on Sunday night.
The band, whose hit songs include 'Go on Home British Soldiers', were met with rapturous cheers when the band's lead singer, Mick O'Brien, launched into a rant about 'the British in Ireland'.
The singer was filmed saying that it's about time the British Army and their "Orange comrades" all "f**ked off back to England."
A PSNI spokesperson said: "The PSNI have received a complaint and enquiries are ongoing."
DUP councillor Lee Reynolds called on the festival's sponsors to reject and future funding for the Ardoyne Fleadh.
He said: "This turn of events comes as no surprise whatsoever.
"It is up to Sinn Fein, the SDLP and Alliance, and the Lord Mayor, who has previously defended this event, to be made accountable for allowing it to proceed.
"I believe this behaviour is justifiable grounds for pulling all public funding for the event and the two sponsors Ladbrokes and Flax Trust should disassociate themselves from it."
SDLP MLA for North Belfast, Alban Maginess, said: "If there was indeed any instance of intolerant speech then that is wrong.
"Many of us are trying to create a city of reconciled citizens at peace with themselves. The SDLP strongly condemn republican and loyalist intolerance.
"It would, however, be incredibly short-sighted to end an entire community festival which encompasses art, sport and political debate based on the actions of one group.
"The SDLP is opposed to bigotry, intolerance and hatred regardless of its source."
Mick O'Brien of The Druids told the Belfast Telegraph that his words were taken out of context.
"That is not what was said at all," he said.
"From a republican point of view there is still occupation of Ireland. Basically what we were saying is that there is still occupation of Ireland. We would like to see that changed and see a 32 county republic.
"We never mentioned the IRA once during our set. There is no doubt a united Ireland will be brought about by peaceful means. The day is coming fast when we will have a united Ireland."