EL PASO, Texas (Border Report) — U.S. Border Patrol agents seized drugs and weapons after encountering four Mexican nationals along the northern border in Sweetgrass, Montana, U.S Customs and Border Protection said.

Border agents from the Havre Sector said they first spotted two people walking along the U.S.-Canada border and determined that both individuals were in the country illegally as they hurried to a vehicle.

Agents then conducted an immigration inspection on the vehicle and learned that the two occupants were also allegedly in the country illegally, CBP said in a news release.

Agents said a drug-sniffing dog alerted them to possible narcotics and drug paraphernalia in the vehicle. Agents said they found methamphetamine, cocaine, and “freebase cocaine,” as well as a loaded firearm, three magazines, and one of the individuals in possession of more than $12,000.

“Havre Sector’s commitment to border security once again shows that vigilance is necessary to gaining operational advantage against all northern border threats,” Acting Deputy Chief Patrol Agent Samuel Rodriguez said in a statement. “Our ability to detect and identify threats is paramount, and the boots on the ground are crucial to that success. I am proud of the work these agents do every day.”

All four individuals were arrested and taken to the Sweetgrass Border Patrol Station for further processing.