A post on the GMP Manchester North Facebook page read: "There are concerns for Keith Tarpey, 50yrs, who has not seen seen for some time.
"He is known to the Oldham and Ashton areas.
"If you have any information on Keith's whereabouts, or have seen him, please call us on 07584 224 903-PC Helen McNeill or 0161 856 4024."
