A pensioner had her purse stolen while she was shopping in Corby town centre.
After visiting the Post Office and Iceland, the 71-year-old woman, who was using a shopping trolley and walking stick, went into the British Heart Foundation charity shop, where she fell or was pushed over.
After getting up, she left the shop and returned to the Post Office, when she realised that her purse was missing.
The incident happened on Tuesday, 26 May, between 11am and 11.20am.
Anyone who may have witnessed the incident or noticed anything suspicious, is asked to contact Corby police on 101.
Officers would particularly like to speak to a man and woman who are believed to have bumped into the victim as she was going into the charity shop.
Alternatively, they can call the independent charity Crimestoppers anonymously on 0800 555 111 or use the anonymous online form at www.crimestoppers-uk.org.