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Douglas McDonald Missing

Vancouver police are asking the public to help locate a 73-year-old man suffering from dementia.

was last seen at his residence in the 4500-block of Valley Drive on Thursday afternoon.

Police say he may be disoriented and unable to find his way home.

He's described as white, 5-11 tall with a slim build, blue eyes, curly grey hair, a beard and mustache. He is believed to be wearing a grey windbreaker and beige pants.

Anyone who sees McDonald is asked to call 911 immediately and wait with him until police arrive.