An armed robbery at a house in Finglas in Dublin last night is believed by gardaí to be a case of mistaken identity.

Two families were tied up and threatened with a gun and a knife by four armed men who broke into a house on Heathfield Way at around 10.30pm. 

Two couples, each with one child aged six and 13, were in the house last night when the two men broke in looking for money.

They tied up the parents and the 13-year-old child with cable ties and terrorised the families, putting a shotgun into the mouth of one of the adults.

Dressed like gardaí in fluorescent jackets, they left a short time later taking with them a small amount of personal cash.

The children's fathers were treated at Connolly Hospital Blanchardstown for minor injuries.

Gardaí say four men were involved in the armed robbery.

They have recovered a car which they believe was used in the attack; a dark coloured Opel Insignia, which was stolen in Ashbourne in Co Meath.

Gardaí say the families have been extremely traumatised by the experience.

The couples are originally from the Philippines and are employed here as care workers.

Gardaí believe the gang mistook them for restaurant owners believing wrongly that they had access to large sums of cash.

The house remains sealed off today for a forensic examination.

Anyone who may have witnessed anything in the Cappagh Road Heathfield Estate area is asked to contact gardaí.

Finglas Garda Station on 01-6667500, the Garda Confidential Line on 1800-666-111 or any garda station are seeking anyone with information to contact them.