Gardai have rushed to the scene in South Dublin after a stabbing incident at a schools open day.
The incident happened at around 11.15am outside the RDS.
It's understood a teenager has been taken to hospital as armed gardai flood the scene.
Two others also sustained injuries, none of which are believed to be serious.
Two events have been taking place in the venue today, one of which is a higher options showing for secondary school students.
A garda spokesperson said: Gardai are investigating an assault of a youth that took place on Simmonscourt Rd, Donnybrook this morning Friday 20th September 2019.
"The male was taken to St. Vincent's University Hospital with minor injuries. Investigations are ongoing."
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