People in Jobstown are in shock after a teenage boy was stabbed to death there.
The Guards say it happened at Kilclare Crescent at around 3 o'clock.
Nobody's been arrested but the Guards want to speak to anyone who may have witnessed the incident..
People can contact Tallaght Garda Station on 01 666 6000, The Garda Confidential Telephone Line 1800 666 111 or any Garda Station.
The Garda Technichal Bureau's scheduled to attend the scene later this evening.
These locals told us they can't believe it:
