KINGSVILLE Border Patrol agents from the Rio Grande Valley sector intercepted more than 3,500 pounds of marijuana hidden in a tractor-trailer at a traffic checkpoint Sunday.

Agents working at the Sarita Border Patrol traffic checkpoint observed a tractor-trailer enter the primary inspection area.

While an agent checked the truck driver's immigration status, a border patrol canine team conducted a non-intrusive, free air sniff around the trailer. The canine alerted to the possible presence of narcotics in the trailer and the driver was directed to the secondary inspection area.

A search of the trailer uncovered 128 bundles of marijuana with a combined weight of 3,531 pounds concealed amongst some air conditioning parts. The load of marijuana is worth more than $2.8 million. The driver, a United States citizen from Shelby, North Carolina, was arrested.

The tractor-trailer, driver, and marijuana were turned over to the Drug Enforcement Administration (DEA) for further investigation.

To report suspicious activity, contact the Rio Grande Valley Border Patrol sectors' toll free telephone number at 1-800-863-9382.