A baby has been found dead inside a vehicle on Tuesday night near Rockwall Heath High School, officials said.

Rockwall police said the Heath Department of Public Safety was called to the teacher/staff parking lot of the high school around 4:40 p.m. for an unconscious infant left in a car. 

"The infant was deceased, and it is believed that the child was left unattended in the vehicle for an undetermined amount of time while parked at a residence in Rockwall," Rockwall police said in a news release. 

Rockwall police said further, "Many of the details are still being investigated, but we currently believe the infant was initially left in a vehicle at a residence, and later discovered when the vehicle was at  Rockwall Heath High School."

Rockwall ISD told CBS News Texas that no students were involved in the incident, and parents and staff were informed of the ongoing police investigation. 

"Our hearts go out to the family of this child during this very difficult time," the district said in a statement.