Two men remain in Garda custody tonight after the discovery of a firearm.
The men, aged 22 and 28, were arrested after been seen acting suspiciously by officers in an area in Dublin between the Royal Canal and the Dublin Industrial Estate, Glasnevin.
A car and a motorbike were also seized during the incident at 3pm.
A Garda spokesman said the pair were being held separately at Cabra and Blanchardstown garda stations.
They can be detained for up to 72 hours.