The alarm went off, but the raiders escaped

She was so traumatised that she had to be sedated in hospital following the incident on Tuesday night.

Police in Buckley have confirmed that they are linking the crime to three similar incidents in the immediate area.

Detectives who have launched a major investigation have admitted they have been looking at links between the raid and other cases.

'Deeply traumatised'

In one incident was at Bagillt, Saltney Ferry, where the post master was tied up, and another was a failed attempt at a robbery at Mynydd Isa near Mold.

Detective Inspector Andy Hughes from North Wales Police CID has appealed for witnesses to come forward.

He said the latest incident had been "absolutely horrifying" for the victim, who was "deeply traumatised".

Dog barking

Mrs Williams was along in her house and went outside to investigate after her dog started barking.

She was grabbed by a masked man who forced her into a car which contained two other men, who were also masked.

They then drove her to the post office where she was forced to open the safe.

The alarm at the premises was activated but not before the raiders were able to empty the contents of the safe - thought to be several thousand pounds.

The men - who did not use any weapons - are believed to have escaped in a dark Volvo car.

Anyone with information should contact Flintshire CID at Mold police station.