Thieves have escaped with a "large amount" of money following a late-night robbery at a building society in Newtown, Powys.
Police said two men wearing reflective jackets attacked security staff who were delivering cash to the Nationwide in High Street at about 2200 GMT.
They used sledge hammers to smash the front door and stole an undisclosed amount of money from a cash machine.
Dyfed-Powys Police said the raiders left the scene at speed in a vehicle.
An area of High Street remains cordoned off.
Anyone with information can contact Newtown CID on 0845 330 2000 or Crimestoppers on 0800 555 111.