The Mexican army says it has found 73 Central American migrants in three houses near the U.S. border and troops arrested four men suspected of planning to smuggle the people into Texas.
A Defense Department statement Thursday says the illegal immigrants, including 18 minors, are being treated as witnesses in the case.
Soldiers raided the three homes simultaneously Tuesday in the city of Miguel Aleman, which is across from Roma, Texas.
The army and federal police have increasingly been rescuing migrants who have been kidnapped and held for ransom by drug cartels along the U.S. border. But it wasn't clear if the migrants found in Miguel Aleman were being held against their will.