A 1-year-old died after being left in a car for an extended period of time in south St. Louis County Monday.

Police responded to the parking lot of the Casa dia Montessori School on the 600 block of Kinswood Lane around 5 p.m. on Monday for a sick case. When they arrived, they found the boy unresponsive and began life-saving efforts.

The 1-year-old was rushed to the hospital where he was pronounced dead. On Tuesday, police identified the boy as Tate Mitchell.

It’s unclear who the vehicle belonged to where he was found, but police say it was not a school vehicle. Police said the baby was left in the vehicle since the morning.

An autopsy was completed Tuesday, and St. Louis County’s Crimes Against Persons Bureau is still investigating.

Anyone with information should contact 636-529-8210 or CrimeStoppers at 1-866-371-8477.

Statement from Casa dia Montessori-Kinswood

At 4:55 p.m. on Sept. 11, a mother arrived at Casa dia Montessori-Kinswood with an unresponsive child in her van. Once the mother realized he was unresponsive in her van, the student was brought into the building. 911 was called and cpr was administered to try to revive the child. The child was then transported by ambulance to St. Anthony’s Hospital.

All of our hearts are so saddened by this tragedy. And we grieve with this family at the terrible loss of this child. Please keep them in your thoughts and prayers.

Click here to see the tips St. Louis Children's Hospital has provided on their website.

This story will be updated as more information becomes available.