UTICA - Illinois Conservation Police say a 21-year-old suburban Chicago man has died after a tree branch he was leaning against at Starved Rock State Park broke, sending him 81 feet down a canyon.

Police said Tuesday that Milos Hrsto of Lake Forest was hiking Sunday with family members on Pontiac Canyon's upper trail. Authorities say he had stepped 6 to 8 feet off the trail to look over the canyon's rim when the accident occurred.

Hrsto was taken to Illinois Valley Community Hospital in Peru, where he was pronounced dead. Results from a Monday autopsy were not immediately available.

The Illinois Department of Natural Resources says it is investigating his death.