Motorists have been urged to make sure their spare wheels are secured to their vehicles safely following a spate of thefts across the county.
In the past three days, thieves have stolen the spare wheels from underneath four cars across Northamptonshire.
The thefts happened in Daventry, Kilsby, Chapel Brampton and Wellingborough.
To help prevent the thefts, officers have suggested spare wheels are attached to vehicles with locking wheel nuts.
Witnesses to any of these crimes, or anyone with any information about them, can call Northamptonshire Police on 101 or Crimestoppers anonymously on 0800 555 111.