A robber threatened mobile phone shop staff during a raid this afternoon.
The robbery happened at about 12.45pm, when a man entered Carphone Warehouse, The Drapery, Northampton, and threatened staff.
He took four phones from a display before running out of the shop, into the town centre.
The offender is described as white, slim and 5ft 10in to 6ft tall.
He had a pale, gaunt-looking face, with acne.
He was wearing slim-fitting jeans, a jacket and a grey baseball cap.
Witnesses, or anyone with information, should call Northamptonshire Police on 101 or Crimestoppers on 0800 555111.