Some northeast Iowans are being warned to be on the lookout for a door-to-door salesman selling what may be tainted meat. The Buchanan County Sheriff’s office is seeking a man driving a blue truck with a blue freezer compartment who recently approached county residents. The man claims to represent Prairie Food Distributing. The sheriff’s office is saying there is a possibility the meat may not be safe for human consumption. Deputies were unable to provide a further description of the man or truck or whether the meat had been tested. Anyone who has encountered the salesman or who may have purchased the meat is asked to call the Buchanan County Sheriff’s office at (319) 334-2568.