DOUGLAS, Arizona -- Border authorities say they've seized more than 13.6 kilograms of crystal meth that a man was trying to smuggle into Arizona from Mexico.

U.S. Customs and Border Protection officers say they stopped a pickup truck at the Douglas Port of Entry last Friday.

An inspection led to the discovery of several packages of crystal meth concealed inside a compartment built into the firewall behind the truck's back seat. They say the packages of crystal meth has an estimated street value of $1.4 million.

Authorities say the driver of the truck was an 18-year-old man who's an American citizen but a resident of Hermosillo, Sonora. The unidentified suspect was turned over to Immigration and Customs Enforcement for prosecution.