A man in his late 20s has been arrested following a robbery at a post office in Dublin this afternoon.

The robbery took place at Blackrock Post Office at around 4pm when the man threatened staff with what is believed to have been an imitation firearm

As the man left the premises he was confronted by local gardaí.

A sum of money and the imitation firearm were recovered at the scene.

The man is being held at Blackrock Garda Station