Gardaí have warned the public to look out for banknotes that were discoloured by a red security dye during a robbery in Dublin this week.
A security van was held up as it making a lodgement to Cappagh post office in Finglas at about 4.20pm on Wednesday.
A gunman confronted one of the security staff and stole a moneybox containing an undisclosed amount of cash before escaping on a waiting motorcycle driven by an accomplice.
A Garda spokesman said the money box was fitted with a security device that sprays dye onto notes when it is opened. He said it is believed the tainted notes could now be in circulation in the capital.
Retailers and members of the public are asked to contact gardaí if they encounter the damaged notes at Finglas Garda station (01-6667500) or on the Garda Confidential Line 1-800-666-111.