U.S. Border Patrol agents seized more than 300 pounds of marijuana after using infrared equipment to spot two people walking in the Southern New Mexico desert during a dust storm.

Officials said that agents from the Lordsburg station found seven abandoned burlap sacks filled with packages of marijuana, but the two people carrying the sacks escaped.

In a separate case on Saturday, Border Patrol agents found 178 pounds of marijuana in a hidden compartment in a truck at the NM Highway 185 checkpoint north of Las Cruces. The drugs, truck and driver were handed over to the Drug Enforcement Administration.