A TEENAGER needed 19 stitches for injuries caused by a blade after a high school reunion ended in violence.

Police said the 18-year-old victim suffered cuts to his arm during a disturbance outside the River Inn, in Houston Road, Crosslee, at around 10pm on Saturday.

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A group of young people who had been enjoying a night out at the popular pub were confronted by a youth, allegedly armed with a knife, after making their way outside to go for some food.

It's understood the boy brandished a weapon at them before demanding money.

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After the group returned to the pub, the 18-year-old was allegedly attacked.

Police confirmed that a 16-year-old boy was arrested following the incident but has since been released on an undertaking.

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