Border Patrol agents stopped a tractor trailer rig being used to smuggle undocumented immigrants into the U.S.

The incident occurred Monday evening when the big rig was at the Border Patrol checkpoint near Campo, California. During primary inspection a Border Patrol canine detection team alerted to the trailer. In secondary inspection agents discovered nine illegal aliens locked inside the trailer. The driver , a Mexican citizen , and the undocumented immigrants were all placed under arrest. Later that evening , agents saw a Dodge Durango making unusual driving patterns on Interstate 8. The SUV had been observed with the big rig that morning. Agents questioned the driver , a Mexican citizen , and determined that he was a co-conspirator with the big rig driver in the smuggling attempt. Both drivers are now in federal custody pending felony alien smuggling charges.