NOGALES, Ariz. — A shipment of Ford Fusions traveling by rail from Mexico to Minnesota has been found to have marijuana hidden inside the vehicles.

The shipment contained 15 Ford Fusions and each one had marijuana concealed in the trunks' spare-tire space, the Arizona Daily Star reported Thursday.

A truck driver in a St. Paul rail yard had discovered the pot in two vehicles. The discovery was followed by another find by BNSF Railway police: the train car containing the Fusions had arrived five days earlier, and 13 of the 15 Fusions were sent to car dealerships, the report stated.

All 13 cars were tracked down, although some were as far away as 170 miles away. Marijuana was found in each of them.

Each of the first two cars had 40 pounds of marijuana molded into the shape of spare tires and tucked inside plastic wrap, aluminum foil, coffee grounds and garbage bags.

Fusions are made at the Ford plant in Sonora, Mexico, and some are shipped by rail through the border crossing in Nogales, Arizona.

Police do not have any suspects, said Steve Linders, a spokesman for the St. Paul, Minnesota, police.

A spokeswoman for Ford said the company is aware of the situation and cooperating with the investigation, but declined to provide any more information

In a separate incident on March 10, railroad police notified the police department in Dilworth, Minnesota, that marijuana was found in a Ford Fusion from Mexico.

Police searched more than 400 other vehicles in the Dilworth rail yard and found 217 pounds of marijuana packaged and sealed to look like spare tires in seven new Fusions from Mexico, Dilworth Police Chief Ty Sharpe said.

At the Arizona-Sonora border in May 2015, the Mexican military found 430 pounds of marijuana in the spare-tire spaces of 14 new cars inside a rail car in Nogales, Sonora.