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Michigan ( WWJ ) -- A nearly 400-pound haul of cocaine was seized as U.S. and Canadian authorities followed up on suspicious activity in St. Clair County, Michigan.

The investigation began about 6:30 p.m. Nov. 25, the St. Clair County Sheriff's Office said. That's when members of the U.S. Homeland Security Task Force North noticed two commercial vehicles with Ontario plates parked at a Michigan truck stop. The two trucks left the area in opposite directions.

One of the trucks traveled to the Blue Water Bridge in Port Huron, where authorities did a vehicle inspection with the assistance of Warren Police Department K-9 Argo.

Officers found the nearly 400 pounds of cocaine in that vehicle, deputies said.

Officers saw the second vehicle swerving whil

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