A teenager is fighting for his life after a stabbing in Co Dublin on Thursday evening.
A man has been arrested for questioning in connection with the incident and a garda investigation is underway.
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Gardaí said they were alerted to a serious assault that occurred on Brookdale Avenue in Swords at about 7pm.
A man (19) was taken from the scene to Beaumont Hospital for treatment. His condition has been described as critical.
The scene has been preserved for a technical examination.
Gardaí said a man in his early 20s has since been arrested and is currently detained under Section 4 of the Criminal Justice Act, 1984 in Swords Garda Station.
They have appealed to anyone who may have information in relation to the incident to contact 01-666 4700.