UPDATE: Russell Temple has been found safe and well.
Police have thanked the public for their assistance.
Mandurah Police are seeking information regarding the whereabouts of a 74-year-old Greenfields man with dementia, who was last seen leaving his home around 5am this morning.
Russell Temple is driving a white 2017 model Isuzu D-Max utility, WA registration number MH4770A.
He is described as fair skinned, with a slim build, approximately 190cms tall, grey thinning hair, a moustache and brown eyes.
Mr Temple was last seen wearing a blue and white striped t-shirt, black jeans, enclosed shoes and uses a walking stick.
He has dementia and could be heading to the Karrakatta or Bentley areas.
Concerns are held for his welfare and anyone who sees Mr Temple or his vehicle is asked to call police immediately on 131 444.