An 11-month-old girl was found dead after being locked in a car for approximately 15 hours in Missouri.

Calverton Park police officer Chris Robertson told ABC that on Sunday afternoon, at around 4:30 p.m., Joseline Eichelberger was found outside of a home in Calverton Park, which is about 14 miles outside of St. Louis. First responders tried to revive her, but it was too late.

"Temperatures reached about 79 degrees that afternoon which inside of a hot vehicle can get much hotter," Calverton Park Public Information Officer Chris Robertson said, reports Fox-2 Now.

He continued, "It’s heartbreaking when there’s any life lost especially when you’re dealing with a child and of an age that young."

Eichelberger was found by her grandmother, who said, along with other family members, that the child's parents mistakenly thought the other parent was with the child and going to take her out of the car. 

"Nobody would intentionally do that," said a Lilly Belfield, a cousin. "If you saw her smile, laugh, giggle, you would think the same thing. Nobody would ever hurt this baby."

So far, there have been two persons of interest that authorities have spoken to, reports ABC, but no arrests have been made in the case. 

Last month, a 4-year-old boy in Minnesota was found dead after his father left him in a car for nearly six hours. The father later told police that he was unable to find anyone to watch the boy while he worked and was charged with second-degree manslaughter.