Officers are concerned for the welfare of a 28-year-old Bradford man who has not been seen for a week.
Adil Akksar was last seen in the Airedale area of Bradford at midday on Monday, 7 March.
He is described as an Asian man, 6ft 2ins tall, of medium build, with short, black hair and facial hair.
Extensive enquiries have been made over the past week to locate him but at this time his whereabouts are not known.
Anyone who has seen him or with information about his movements or whereabouts is asked to contact police by calling 101 or using 101 Live Chat, quoting log 628 of 03/07.
Similarly, if Adil himself becomes aware of this appeal he is asked to make contact with the police to confirm he is okay.