Two suitcases full of methamphetamine were found in a Washington state forest on Monday, officials said — though it's still a mystery as to how huge haul of drugs got there.

The luggage was discovered in a "heavily brushy area" of the Okanogan National Forest, located in the north-central part of the state, near the town of Mazama.

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Estimated to be worth $1 million, the suitcases weighed 186 pounds, Okanogan County Sheriff Tony Hawley said.

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Sgt. Gene Davis and his K-9 partner, Gunner, were working with Homeland Security Investigations with the "cross border air smuggling investigation" when they discovered the drugs.