Vandals have smashed a window at Diss Museum.
It happened at the building, in Market Place, between 4pm on Friday and 7.30am the following day.
A spokesperson for the museum said: “A temporary repair has been carried out by the museum staff but the trustees will have to pay for the permanent repair if the offender is not caught.
“They will have to divert funds which were intended for the promotion of the museum.”
Anyone with information should contact PC Steve Phillips at Diss Police Station on 101 or call Crimestoppers anonymously on 0800 555111.