AUBURN (CBS) —  Medical examiners were unable to find the cause of death of an Auburn toddler who died in foster care.

Avalena Conway-Coxon, 2, died, and another 22-month-old girl was found near-death at an Auburn foster home on August 15, 2015.

A report released by the Department of Children and Families in October said the girls suffered from heat stroke, “which would indicate that they had prolonged exposure to a high temperature environment.”

The incident remains under investigation.