A search is on-going for a missing Clare teen believed to be armed.

19-year-old Jack Dinan from Ennis hasn't been seen since he left home on Tuesday.

Members of the public are advised to contact gardai and not to approach the young man.

Yesterday the Blanchardstown Centre in west Dublin was evacuated after a possible sighting of an armed person in the car park, but the operation was later stood down.

Crime Editor with the Irish Sun Stephen Breen says officers have to act on information, 'With issues of this nature, the public's safety is paramount'.