Authorities say 370 pounds of marijuana valued at more than $400,000 have been found in tanker car at a Cargill plant in Blair in eastern Nebraska.

Washington County authorities found the pot behind a false wall in the tanker Sunday night.

Detective Kevin Willis says it looks like automotive putty was used to make the false wall, which was blended in and painted.

Willis says the tanker, which originated in Mexico, will be traced to determine where it came from and where it was going.

This is the second drug seizure at the Cargill plant in Blair this year. In May, employees found 600 pounds of marijuana when they cleaned a railcar that was hauling corn syrup.