Ardmore police are investigating the circumstances of a baby who died Monday from what is believed to be heat-related injuries.

Sgt. Ryan Hunnicutt, Ardmore Police Department public information officer, said police and medical personnel responded about 3:40 p.m. to a call from a Michelin Road convenience store reporting the month-old girl was not breathing.

"The parents, the baby and a 15-month-old sibling were traveling from Ohio to Ringling. The car did not have air conditioning. It was packed with possessions, and only one window was rolled down," Hunnicutt said. "They stopped for water at the store, and realized the baby was not breathing."

CPR instructions were given, via the 911 call, until emergency medical personnel arrived on the scene. The baby was taken to a local emergency room where she was pronounced dead.

Temperatures Monday in southern Oklahoma were in the upper 90s, with some areas reaching 100 degrees.

Hunnicutt said, while the baby is believed to have died from heat, child neglect has not been ruled out as a "contributing factor."

Department of Human Services child welfare workers are assisting in the investigation. Hunnicutt said the 15-month-old child escaped injury as a result of the stifling car, but has been taken into protective custody pending the outcome of the investigation.

Detective Billy Turner, APD Criminal Investigation Division, is assigned as the lead investigator in the case.

"Det. Turner said he and several workers from DHS will do a complete investigation as to the nature and cause of this child's death, and work to ensure the safety of the surviving sibling," Hunnicutt said.

Police are urging area residents to be especially vigilant in protecting infants and children from scorching temperatures.

"Children, especially small children, are not able to regulate their body temperature as well as a healthy adult. We would urge anyone who has children in their care to be extremely cautious and careful, and seek immediate medical attention for children displaying any symptoms of heat exposure or dehydration," he said.