(CNN)At least nine people are dead after a phone call from a Walmart employee led to the discovery of dozens of undocumented immigrants severely injured in the back of a tractor-trailer in Texas early Sunday, according to federal authorities.
My heart goes out to the victim’s families. Our human trafficking unit will provide any resources needed to help w/the investigation.
— TX AG’s Office (@TXAG) July 23, 2017
CNN’s Sheena Jones, Jason Morris, Ed Lavandera, Kevin Bohn and Darran Simon contributed to this report.