An investigation is set to take place after a brawl at the Balmoral Show this evening.
Video footage emerged on social media which showed a large number of people involved in an altercation in the bar area on Friday.
Security staff can be seen pulling the individuals apart.
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The Royal Ulster Agricultural Society said officials would fully investigate the incident.
In a statement, the Royal Ulster Agricultural Society said: "There was an altercation at the bar area, which was quickly brought under control by the event security personnel and we believe no one was seriously injured.
"It is sad that a few people resorted to this behaviour when tens of thousands of people enjoyed a fun family day out.
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"The Society will be fully investigating this matter and appropriate action taken."
A PSNI spokesman said: "Police are investigating the report of an assault at the Balmoral Park area of Lisburn on the evening of Friday 17 May. Enquiries are ongoing."
A spokesman from the NI Ambulance Service said they had not been called to the incident.
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