UFC star Conor McGregor has reportedly been charged with assault for punching an elderly man at a Dublin, Ireland bar back in April.

According to ESPN, McGregor served with a summons and is due to appear in Dublin court on October 11.

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McGregor’s assault charge comes with a maximum of six months in prison if he is convicted, a fine of $1,646 or both, according to The Independent.

The 31-year-old previously expressed regret over the incident, which allegedly stemmed from an older customer at the bar turning down McGregor’s brand of whiskey.

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