A woman’s plan to smuggle methamphetamine across the Nogales border Tuesday night was foiled by an alert drug dog.

Karla Miramontes-Cuellar, 33, of Mexico, was driving a Ford sedan through the Nogales port of entry when a narcotics detection dog got a whiff of the meth, according to a news release from U.S. Customs and Border Protection.

A search of the car turned up 21 packages of meth weighing a total of 29 pounds hidden in a non-factory compartment behind the back seat.

The drugs had a street value of $87,000, according to the news release.

The vehicle and drugs were processed for seizure. Miramontes was referred to U.S. Immigration and Customs Enforcement’s Homeland Security Investigations.