A Tucson woman was arrested Thursday in Nogales on suspicion of trying to smuggle nearly 21 pounds of heroin and methamphetamine into the United States.

U.S. Customs and Border Protection officers referred Cynthia Teresa Flores, 24, for an additional inspection of her Nissan sedan at the Dennis DeConcini Port of Entry.

After a CBP dog alerted to the presence of drugs behind the dashboard, officers removed three packages of heroin weighing nearly 4 pounds and worth more than $52,000.

In addition, officers found 12 packages of meth weighing nearly 17 pounds and valued in excess of $262,000.

The drugs and vehicle were seized. Flores was turned over to U.S. Immigration and Customs Enforcement’s Homeland Security Investigations.