Leaded windows at the Newtown Town Council offices have been damaged.
Police said the criminal damage was caused when three leaded panes of glass were smashed at Brisco House in Seven Street, just off The Cross in the town centre.
PC Sue Brown said the incident occurred between 5pm on 4 May and 8am on 8 May.
Anyone with information is asked to contact PC Brown by telephoning Newtown Police on 101.
Photo: Brisco House where the windows were damaged