LUKEVILLE, Ariz. (AP) — A Montana mother and son have been arrested for allegedly trying to smuggle nearly 1,200 pounds of marijuana into Arizona.

U.S. Customs and Border Protection officials identified the suspects as 53-year-old Barbara Muhs and 33-year-old Marvin Triggs, both of Shepherd, Mont.

CBP officers referred Muhs and her son for a secondary inspection of their recreational vehicle on Monday at the Lukeville Port in southern Arizona.

When officers used a non-intrusive X-ray to inspect the RV, they noticed irregularities throughout the vehicle floor.

A closer inspection revealed 50 packages of marijuana hidden under the flooring. The pot was valued at more than $588,000.

The drugs and vehicle were processed for seizure.

Authorities say Muhs and Triggs were turned over to U.S. Immigration and Customs Enforcement's Homeland Security Investigations for prosecution.