FORT WAYNE, Ind. (AP) — An autopsy has revealed that a 4-year-old suburban Chicago boy who was pulled from a retention pond in northeastern Indiana drowned.

The Allen County coroner’s office says Thursday that Dhanush Kurra’s April 26 death was accidental.

The boy was found in the Fort Wayne pond by family members. He was taken to a hospital where he was pronounced dead.

Investigators said the child, who lived in Arlington Heights, had apparently wandered away from a home and was missing for about 20 minutes before being found.