The vehicle was stopped while trying to cross the border at Arizona’s Port of Lukeville on Saturday, Dec. 30.
A K-9 that was trained to detect marijuana alerted officers to the drugs as the motorhome was going through customs.
Customs and Border Protection officers removed 120 bundles of marijuana, “from the storage compartments, walls, and floor of the motorhome,” Customs and Border Protection said in a press release.
Based on an estimate of about $500 per pound, Customs and Border Protection estimates that the haul was worth $1.2 million.
The 55-year-old driver of the vehicle, who was from Phoenix, was arrested and turned over to the U.S. Immigration and Customs Enforcement’s (ICE) Homeland Security Investigations.