Armadale Detectives have now released images of three vehicles in the area when an elderly couple were assaulted at their Oakford home last month.
On Sunday February 11 police reported a 71-year-old man and his 64-year-old wife were beaten by an unknown man out the front of their home in Oakford
It's understood the offender left the scene in a dark coloured Ute.
Armadale Detectives have identified the following vehicles to be in the area at the time of the attack.
Authorities are now appealing for the drivers of the three vehicles to come forward, as they may have information and/or vision of the dark coloured utility involved in the incident.
The male victim was treated at Royal Perth Hospital and needed staples in his head.
Police also previously released an image of the man thought to be involved with the assault.
Anyone with information regarding this incident is asked to call Crime Stoppers on 1800 333 000 or report the information online at www.crimestopperswa.com.au.