A 3-month-old Pennsylvania boy is dead after being left in a hot minivan for “several hours.”

Allegheny Police were called to Upper Saint Clair at about 5 p.m. Thursday, when they found an unresponsive infant, according to TribLive.

Paramedics attempts to save the baby boy, identified as Kayden Nguyen, were unsuccessful, and he was pronounced dead at the scene.

“Detectives are working to confirm the timeline of events through surveillance video in the area,” police said in a statement.”They are also downloading and reviewing data from the vehicle’s on board computer.”

Investigators said no decision on charges would be made until the medical examiner determines cause and manner of death, and then such a decision would be made by the Allegheny County District Attorney’s Office.

The organization Kids and Cars says little Kayden’s death is the fifth hot car death in the United States this year.

The heat index in the Pittsburgh area was 99 degrees on Thursday afternoon, the National Weather Service said.

“If the temperature is 90 degrees outside, after 30 minutes it can feel like it is 120 degrees inside a vehicle and it can reach 133 degrees after 60 minutes,” said meteorologist Shannon Hefferan. “It’s like a greenhouse (inside a vehicle).”

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