West Yorkshire Police have released CCTV footage of the last known sighting of missing 83-year-old David Hardcastle.
David was last seen on a towpath of the Shepley Bridge Marina in Mirfield at around 8.30am on 10 October and was later reported missing.
His car, which is a Silver Nissan Micra, was parked just after 8am in the car park of the Ship Inn on Steanard Lane.
Extensive investigations are being carried out in the area, including underwater searches.
He is described as white, 5ft 7” tall, slim build with grey hair and moustache. He was also last seen wearing a navy blue coat, grey trousers and dark shoes.