The Scottish Premier League has confirmed it will investigate reports of pro-IRA chanting at Celtic's recent home match against Hibernian.
Operations director Iain Blair confirmed that police match commander Eddie Smith notified them following the match on 29 October.
"Eddie mentioned there was pro-IRA chanting but we need to find out more about what happened," Blair said.
"It was included in the report and is subject to an ongoing investigation."
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It has been reported that two arrests were made during the 0-0 draw against Hibs.
"I am currently gathering information about what happened during the match when the arrests were made," Blair added.
"We also have to establish that Celtic, as I am sure they will have, co-operated fully with the police in the aftermath of this event.
"Our rules are not the same as Uefa's and it's important people recognise this.
"We have to be strong in our condemnation of pro-IRA chanting or sectarian chanting and we have to work together to eradicate it from our stadiums."