Thousands of rounds of ammunition headed for Mexico were seized Wednesday by Customs and Border Protection officers assigned to the Dennis DeConcini Port.

CBP officers conducting routine outbound inspections referred Erik Raul Enriquez-Leon, 21, of neighboring Nogales, Sonora, Mexico for an additional inspection of his Mitsubishi sedan. During the inspection, officers located 272 boxes of 7.62 x 39mm ammunition, the type often used in assault weapons, concealed in both rear quarter panels of the vehicle.

The vehicle and ammunition (5,440 rounds) were processed for seizure. Enriquez was arrested and turned over to U.S. Immigration and Customs Enforcement’s Homeland Security Investigations for further investigation.

Individuals arrested may be charged by complaint, the method by which a person is charged with criminal activity, which raises no inference of guilt. An individual is presumed innocent unless and until competent evidence is presented to a jury that establishes guilt beyond a reasonable doubt.