A large amount of jewellery was stolen from a house in Kettering.
Thieves broke into the property in Shakespeare Road sometime between 9.30am and 12.30pm on Friday, July 17.
After getting in through a rear window, the thieves searched the house and took jewellery.
Witnesses, or anyone who knows anything about this incident, can call Northamptonshire Police on 101.
Alternatively, they can call the independent charity Crimestoppers anonymously on 0800 555111 or use the anonymous online form at www.crimestoppers-uk.org.