A 40-year-old Mexican national and an 18-year-old Tucson woman were arrested Thursday in connection with separate attempts to smuggle drugs through the Port of Douglas.

U.S. Customs and Border Protection officers arrested Jorge Enrique Diaz-Lopez after a drug dog alerted officers to eight packages of heroin hidden under the backseat of his Nissan truck, the agency said in a news release.

The drugs weighed about 18 pounds, and have an estimated value of $244,147.

Also, an 18-year-old woman was arrested after officers found 137 packages of marijuana hidden throughout the Lincoln sedan she was driving. The narcotics, weighing 147 pounds with an estimated value $66,290, were hidden in the trunk; rear quarter panels; inside the front and rear seats; the engine compartment and front bumper, the agency said.

Diaz and the Tucson woman were turned over to U.S. Immigration and Customs Enforcement’s Homeland Security Investigations. The drugs and vehicles were seized.