Detectives at Strand Road are appealing for information about a burglary in the Waterside area of Derry.
The burglary was discovered on Saturday evening.
Detective Constable Richard Donnell said: “A downstairs window was broken to gain access and a substantial sum of money was stolen.
“Among this was £500 in £2 coins and we are particularly keen to hear about anyone who has been offered payment for items or services in significant numbers of £2 coins, or about anyone in possession of a large number of the coins.”
Information can be given on the police non-emergency number 101. Alternatively, it can be provided to the Crimestoppers charity anonymously on 0800 555 111.