A gang has stolen what is believed to be a substantial sum of money from a post office in Craigavon, Co Armagh.
The robbers tunnelled through a connecting wall from a neighbouring shop in Craigavon Shopping Centre to break into Legahory Post Office.
They are understood to have spent a lot of time forcing open safes.
The robbery was only discovered yesterday. The RUC believes it could have taken place at any time from Christmas Eve.