RANGERS fans attending a theatre show in Glasgow have been warned over sectarian singing at the event. 

The warning comes after video footage emerged on social media of the audience singing f**k the Pope and the IRA while the cast was on stage.

The Pavilion Theatre has since handed out leaflets ahead of Rally Roon the Rangers' performances to curb such behaviour. 

A poster issuing the warning ahead of shows said: "To conform to the terms and conditions of our theatre licence can we ask all customers to refrain from any sectarian singing inside or outside the theatre".

READ MORE: Are the authorities serious about tackling sectarian singing in Scottish football? 

Rally Roon The Rangers, which stars River City actor Stephen Purdon and Scots Squad star Grado, has been a sell-out at the theatre since it opened on July 24. 

The play was created by the team behind Singin I’m No A Billy He’s A Tim and centres around the story of eight die-hard Rangers fans. 

HeraldScotland:

A poster issuing the warning ahead of shows said: "To conform to the terms and conditions of our theatre licence can we ask all customers to refrain from any sectarian singing inside or outside the theatre".

A spokesman for the theatre told The Scottish Sun said: "We were not expecting this to be honest as the other performances last week were free of any such activities.

"We have now taken steps to write to all customers saying that any sectarian singing or ‘add ons’ are strictly unwanted and unacceptable.

"We are also handing out leaflets as customers are going into the show and have posters displayed within the theatre.

READ MORE: Rangers fan fined after singing sectarian songs 

"The production, in terms of writing, is sectarian free and certainly not anti-catholic as suggested.

"We have also advised customers that if there is sectarian singing the show will be halted and the persons involved will be removed from the premises".

The theatre also said that an edited version of the Tina Turner hit would be played in a bid to stamp out sectarianism.