Gardaí are investigating how a loaded submachine gun belonging to one of their units came to be found in the street.
It was handed into Store Street Garda Station in Dublin's north inner city by a member of the public yesterday.
It is understood to belong to the armed garda unit that is policing the Hutch-Kinahan gangland feud.
Gardaí say a senior officer "has been appointed to examine all the circumstances" surrounding the discovery.
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