Police are appealing for public assistance to help locate missing man Frank.
The 77-year-old was last seen in Cambellfield this morning around 10am.
Police and family have concerns for his welfare due to a medical condition.
Frank is described as Caucasian in appearance, a medium build and short grey hair.
When last seen, he was wearing a black jacket with a grey hood, grey tracksuit pants, black runners and was wearing glasses.
Police have released an image of Frank in the hope someone may recognise him and urge anyone with information to contact 000 or Broadmeadows Police Station on 9302 8222.