An 80-year-old woman was knocked unconscious on her own driveway during a violent robbery in Northampton.
The victim had been shopping in Bellinge when the attack happened at about 1.45pm on Friday, August 4.
A police spokeswoman said the victim remembered coming round from being unconsciousness on her front drive in Station Road, Billing.
"She had suffered a dislocated shoulder during this incident, which police are treating as robbery," the spokeswoman added.
Anyone with information should call Northamptonshire Police on 101 or Crimestoppers, in confidence, on 0800 555111.