Police are appealing for public assistance to help locate missing man Con Giamarelos.
The 81-year-old was last seen in Epping about 1.30pm and was heading to Thomastown in his silver/green Ford Falcon with registration SAP329.
Con is described as 160cm tall, medium build, black hair combed back and was wearing a dark navy jumper over a light grey top and dark navy track pants.
Con has limited English but does speak Greek and may have become disorientated.
He is known to frequent the Epping Plaza, Thomastown Bunnings and Lalor shops on May Street.
Investigators have released a photo of Con in the hope someone may recognise him and be able to provide information on his whereabouts.
Anyone with information is urged to contact Epping Police Station on 9216 1200.