Police are seeking information about three people who pushed over a parked mobility scooter in Northampton.
The vehicle was parked - complete with rain cover - outside its owners' house in Robert Street, The Mounts at about 4am on Friday.
Three young men pushed over the scooter and then ran off.
A spokesman for the Northampton Neighbourhood Team said the victim was an 87-year-old army veteran, who served his country for 23 years.
Anyone with any information can call Northamptonshire Police on 101 or Crimestoppers, anonymously, on 0800 555111.