Border officers found $378,000 of methamphetamine hidden in the doors of an SUV being driven into Arizona on Monday, officials say.

A drug dog alerted to the Ford at the Nogales border crossing, and officers found 16 packages - about 24 pounds in total - of methamphetamine hidden in each of the vehicle's four doors, a news release from U.S. Immigration and Customs Enforcement says.

The unidentified men - 26 and 29 years old - are U.S. citizens. They were referred to U.S. Immigration and Customs Enforcement's Homeland Security Investigations, the release said.

The drugs and vehicle were seized.