Security forces in northern Mexico today hauled in refrigeration equipment for the bodies of 72 Central and South American migrants massacred by drug cartel gunmen at a remote ranch.
Investigators are trying to determine the identities of the victims and why they were gunned down 100 miles from the Texas border.
The sole survivor is an Ecuadorean who escaped and stumbled wounded to a marine checkpoint on a highway.
He told authorities that his captors had identified themselves as Zetas.
Investigators are trying to determine whether the 72 victims in Tamaulipas were killed at the same time -- and why.
The government was taken taking the bodies from the ranch to the small town of San Fernando for identification, and will have to move in refrigeration equipment that the local authorities lack.
On Tuesday, Ecuadorean migrant Luis Freddy Lala Pomavilla staggered to the checkpoint with a bullet wound in his neck.
He told the Mexican marines he had just escaped from gunmen at a ranch in San Fernando, 100 miles south of Brownsville, Texas.