More than 30 undocumented immigrants were discovered riding inside the cab of a tractor trailer at a Laredo checkpoint last week.

The immigrants were found on Wednesday, May 30th at the Laredo, Texas checkpoint.

According to KGNS News, the semi truck was being inspected at the Laredo checkpoint when, for reasons that have not been made clear, it was directed to secondary inspection. A K9 officer then alerted agents that people may be hiding inside the truck. Upon further inspection, agents discovered 35 undocumented immigrants piled into the cab of the trailer.

The 35 individuals were found to be in good health and are believed to be mostly from Mexico and Guatemala.

The truck driver, who has not been named, was promptly arrested by Border Patrol Agents and handed over to Homeland Security Investigations.