Two teenagers are in hospital after being stabbed as gardai hunt their attacker.
The incident happened near Blanchardstown Shopping Centre at around 5.40pm on Wednesday.
Gardai say there are a number of "locations of interest" being examined.
But the Irish Mirror understands the stabbing incident happened in Millennium Park. The victims are then believed to have made their way to the shopping centre by foot and the alarm was raised.
The two victims, boys believed to be aged 14 and 16, are in Temple Street Children's University Hospital with non-life threatening injuries.
Investigators from Blanchardstown Garda Station are now looking to identify the suspect and will be reviewing CCTV as part of the probe.
A Garda spokesman said: "Gardai are appealing for any witnesses to this incident to come forward.
"Any road users who were travelling in the environs of Blanchardstown Shopping Centre at this time who may have camera footage (including dash-cam) are asked to make this footage available to gardai.
"Any persons who were in the Blanchardstown Shopping Centre area and who have mobile phone footage of this incident are asked to contact gardai.
"Anyone with any information is asked to contact Blanchardstown Garda Station on 01 6667000, the Garda Confidential Line on 1800 666 111, or any Garda Station."
