Police are appealing for public assistance to help locate missing Roxburgh Park man Frank.
The 81-year-old was last seen in his vehicle on Moir Drive about 9am on Friday, 20 May.
He is believed to be driving a red 2007 Ford Falcon sedan, with the registration WAB162.
Police have released an image of Frank in the hope it will help locate him.
He is about 170cm tall, of large build with grey short hair.
Frank was last seen wearing a long sleeve grey top with a navy-blue cardigan.
Police and family have concerns for Frank due to his age, declining health and recent memory loss.
Anyone with information on his whereabouts is urged to contact Craigieburn Police Station on (03) 9303 4433.