Two drivers of a Mexican tour bus were arrested at the Highway 80 immigration checkpoint near Tombstone on Wednesday night after border patrol agents found 320 pounds of marijuana hidden in the bus.
According to a U.S. Customs and Border Protection media release, a border patrol canine alerted agents to an odor coming from the back of the bus.
Agents searched the area and found a hidden compartment near the toilet with 264 bricks of marijuana stashed inside.
The drivers, aged 26 and 32, were arrested for drug smuggling.
The bus and the marijuana, worth more than $159,000, were seized by CBP.
The passengers in the tour bus were driven to a nearby business to wait for alternative transportation.