12 undocumented immigrants were found inside a tractor-trailer at the Falfurrias checkpoint on Sunday.
Authorities said agents at the checkpoint referred the tractor-trailer to a secondary area after receiving a Border Patrol K-9 alert.
The report stated that the inspection revealed 12 undocumented immigrants attempting to conceal themselves in the cargo.
Medical assistance was provided to all the undocumented immigrants, however, they all declined.
Border Patrol said all subjects will be processed accordingly and the case is being referred for prosecution.