Gardai are appealing for the public's help in the search for a 16-year-old missing from Mulhuddart.
Marcus Core was last seen on Monday, August 1. He is described as being approximately 5 foot 10 inches in height with a slim build, short brown hair and blue eyes.
He was wearing a grey Under Armour tracksuit and grey Nike runners.
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A garda spokesman said: "Anyone with information on Marcus's whereabouts are asked to contact Blanchardstown Garda Station on 01 6667000, the Garda Confidential Line on 1800 666 111, or any Garda Station."
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