What’s suspected to be a makeshift grave has been unearthed in northwest Iowa. Construction workers in Dickinson County made a surprising discovery while digging a basement yesterday in the Okoboji township — bones, that are thought to be human. Some 24 bones were removed from an area about three feet below the surface. Authorities think the bones have been there a long time and foul play is not suspected at the moment. The bones are being sent to the state medical examiner for analysis.