Two Guatemalan citizens were arrested last week after someone spotted them hiding in the air dam of an 18-wheeler in Hidalgo County. 

U.S. Customs and Border Protection agents and deputies were called to check out the truck after someone concerned for their safety called the sheriff’s office.

“The Operation Big Rig campaign encourages the public to take action and call 911 to help us end these human smuggling tactics,” said Chief Patrol Agent Manuel Padilla, Jr. “We are grateful the message is resonating within our communities and we commend this concerned citizen for potentially saving the lives of these individuals.”

There is no word yet whether the truck’s driver will face any charges.