A Celtic physio is being investigated after Facebook removed her post with the Scottish League Cup trophy which included the Sectarian slur: 'F*** the huns.'
Caitlin Brown, 24, who has worked as a sports therapist with the Celtic women's team for four years, saw her post removed as it violated Facebook's rules on hate speech - as report the Scottish Sun.
Celtic beat bitter rivals Rangers 1-0 on Sunday to lift their 10th straight domestic trophy and Brown posed for a photo with it inside Celtic Park alongside a shamrock and a green heart emoji.
She posted the image again after Facebook removed it with the second attempted reading: 'Since FB removed my post for saying F the Huns.' She has now deleted the account and was unavailable for comment when contacted by the Scottish Sun.
The term 'Hun' is deemed derogatory towards Rangers fans, and though its origins are unclear it emerged around the time of the First World War.
The most common theory is that it was aimed at Rangers-supporting workers at the part-German owned Harland & Wolff company, who discouraged Catholics from working at the Govan shipyard.
Dave Scott, of ant-bigotry campaigners Nil by Mouth, said: 'The term Hun is hotly contested with some regarding it as deeply sectarian and others seeing it as just a generic term of abuse.
'Context is always key. At the very least it's a loaded term which is never used kindly and certainly isn't in this instance.
'We have a Scottish Government backed workplace project which seeks to challenge attitudes and educate employees on these issues.
'Celtic have never taken part to it but given this incident it sounds like something the club should seriously consider.'
Facebook said: 'We don't tolerate hate speech on Facebook – this can include the use of certain slurs. We removed this post for violating our hate speech policies.
'If people see something they think doesn't belong on Facebook, they should report it using the three dots above every piece of content on our platform so that we can take swift action.'
Celtic told the Scottish Sun: 'We are looking into the matter.'