
The offender(s) broke in to the building in St Georges Street sometime between 3pm and 4pm on Sunday, September 11 by entering through the first floor office window causing significant damage.
The suspected entrance point is believed to be Albion Court.
Anyone with information can contact Northamptonshire police on 101. Alternatively, they can call the independent charity Crimestoppers anonymously on 0800 555 111.