The FBI and Navajo Nation Division of Public Safety are investigating the death of a 2-month-old infant.

The baby’s mother told investigators she woke up and found her daughter unresponsive Wednesday morning in the Mentmore, New Mexico, residence, on the Navajo Indian Reservation.

The mother said she put the child in a vehicle and headed to the hospital.

An ambulance crew that met the vehicle before it reached the hospital declared the baby dead.

An autopsy is pending.