Two men are wanted by police after threatening members of staff at a BP garage with a screwdriver before stealing cash and cigarettes.
Thames Valley Police has now released CCTV images from the incident, which took place at 1.50am on Saturday. One of the offenders stood guard, while the other man threatened a member of staff with a screwdriver, before stealing cash and cigarettes.
They then ran away but it is not known in what direction.
The man who threatened the members of staff has a distinctive band tattoo on his right wrist.
Any witnesses can call police on 101 or Crimestoppers, anonymously, on 0800 555 111.