The Kendall County Sheriff's Office is investigating a death at Violet Patch Park in the 1600 block of Route 25 in Oswego. A portion of Route 25 between Boulder Hill Pass and Glendale Avenue was closed for a time for the investigation.
Police say they were called for an unresponsive man in the park on Friday.
Police say, while the investigation is early and could evolve, foul play is not suspected at this time. Police also say there is no danger the public.
While the sheriff's office was not releasing deceased man's age, a spokesman did confirm that he is an adult.
Editor's note: This story was updated to say that Route 25 had been reopened Friday afternoon.