Police believe a medical issue may have caused the death of a Rockland man in a car crash in Rockport Friday morning.It happened around 11 near the intersection of Routes 1 and 90.Rockport Police say a van, driven by 69-year-old Harry Rhodes, went through the intersection, drifted off the road, and slammed into a tree.Patrolman Wesley Butler came upon the accident before it was called in to police. Rhodes was pronounced dead at the scene. “Heading South on Route One, I noticed a handful of people standing outside, pointing towards the woods. In the woods, I noticed a fairly large van that struck a tree head on.”Butler says it’s likely an autopsy will be performed to confirm a medical issue was the cause of death. Traffic was re-routed around that busy intersection for about three hours.