(ABC 6 News) – Rochester police are investigating the death of a 28-year-old Rochester man found in Mayo Park June 15.

According to communications officer Amanda Grayson, a passerby noticed and reported the body just before 7 a.m. Saturday.

Police are working with the Southern Minnesota Regional Medical Examiner’s Office to determine the man’s identity, as well as his cause of death.

Grayson said there were no obvious signs of trauma or injury.