MANDAN, N.D. (AP) -- Authorities say a father and his adult son have been arrested after sheriff's deputies found drugs worth more than $1 million in their pickup truck during an interstate traffic stop in North Dakota.

Morton County sheriff's officials say 53-year-old Robert Earl Smith from Vancouver, Washington and his 24-year-old son Christopher Conkey, from Grants Pass, Oregon, were stopped on Interstate 94 near Mandan on Sunday morning.

The sheriff's office says the son told a deputy they were transporting fan gear to the Super Bowl in Minneapolis. The deputy thought they were acting suspiciously and asked to search the truck.

The request was denied, so a police dog was brought to the scene and alerted authorities to possible drugs. Deputies say 210 pounds of marijuana, methamphetamine and $2,400 in cash was discovered and the two were arrested.

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