A drug tunnel between Arizona and Mexico was discovered under a former fast food restaurant

The tunnel entrance was found inside a former KFC in an Arizona border city.

(CNN)Authorities in Arizona discovered $1 million in drugs during a traffic stop -- and officials say that led them to a nearly 600-foot drug tunnel that runs between a former fast food restaurant and a private home in Mexico.

It all began August 13, when police in the border city of San Luis, Arizona, say they saw the owner of a now-abandoned business bringing several plastic containers outside and loading them onto a trailer, according to court documents obtained by CNN affiliate KGUN.
Officers pulled the man over for an unspecified equipment violation. During the traffic stop, a narcotics dog alerted authorities to the presence of drugs in the two containers.
    Inside the containers, police found 239 packages of various drugs, including over 261 pounds of methamphetamine, 14 pounds of cocaine, 30 pounds of white heroin, 13.7 pounds of brown heroin and 6.8 pounds of fentanyl. The fentanyl alone "translates to over 3 million dosage units," Homeland Security Special Agent Scott Brown told CNN affiliate KYMA on Wednesday.
    Police listed the total value of the drugs at over $1 million.
    The suspect was identified in court documents as Jesus Ivan Lopez Garcia and is facing federal charges including conspiracy to possess with intent to distribute methamphetamine and cocaine. CNN has been unable to determine if he has made his first appearance before a US Magistrate.
    According to court documents, Lopez Garcia purchased the property in April of this year for $390,000. It used to be a Kentucky Fried Chicken restaurant. The criminal complaint filed says "the structure was vacant in recent years and was not used for business."
    Police found drugs inside containers that apparently came through the tunnel.
    Police searched the vacant restaurant two days later and discovered the entrance to a tunnel inside, court documents said.
    Homeland Security Investigations officials told KYMA that the tunnel ran 22 feet deep and traveled nearly 590 feet underground to a residence across the border in San Luis Rio Colorado, Mexico, where it ended in a trap door underneath a bed. Homeland Security did not immediately respond to a CNN request for comment.