A seven-month-old baby died after being left inside the back of a hot pickup truck for most of the day in Houston on Thursday, officials told the Houston Chronicle.

Authorities said the baby's father left the child in the car from the time he dropped his older children off at school in the morning, until after his wife called him late in the afternoon to see how their kids were.

Upon receiving the phone call, the man realized he had left the baby in the vehicle all day and rushed outside to his pickup.

The baby had already died, officials said.

Police, who have not identified the baby's parents or the gender of the baby, have launched an investigation into the death, but are yet to lay any charges.