A 1-year-old South Carolina boy died in a hot car late last month after his grandmother went inside to get her keys and lost consciousness, according to the toddler’s mother.

Speaking with WYFF, Krista Nix said son Joe Avery James Lockaby spent the evening of May 31 at her stepmother’s house when the grandmother put the toddler in her SUV and returned to the Greenville home after realizing she forgot her keys. It was then that the grandmother felt dizzy and passed out, Nix said.

Nix claimed the grandmother is uncertain how long she lost consciousness but when she came to, she found James breathing heavily in the car. She reportedly put cold water on him and called 911.

Senior Deputy Coroner Kent Dill said the 1-year-old was in the car—with the windows up—for an unknown “period of time,” according to Greenville News. Dill claimed the grandmother had removed the unresponsive baby from the vehicle and that he was pronounced dead at the scene.

A coroner’s report obtained by the newspaper stated that James’ estimated “time of injury” was 2 p.m. and that he was pronounced dead at 5 p.m. Reports indicated that it was in the 70s at 4:30 p.m. on the day in question.

According to No Heat Stroke, the South Carolina toddler is the eighth child to die in a hot car this year.

Police spokesman Seargent Ryan Flood said no arrests have been made. Nix told WYFF that the grandmother is being hospitalized.

“It’s a freak accident, his grandmother loved him, she loved all her grandkids, I don’t have any anger towards her cause I know she would never do anything to hurt Joe,” Nix said.

[Featured image: Joe Avery James Lockaby/Facebook]