U.S. Customs and Border Patrol officers found a massive load of drugs Saturday at the Arizona-Mexico border as they confiscated several types of drugs hidden inside a gas tank and other parts of a vehicle, officials said. 

The stash was seized at the Nogales border checkpoint when officers found 2.5 pounds of black tar heroin, nine pounds of heroin and 89 pounds of methamphetamine. 

The biggest find was the 320,000 fentanyl pills, tweeted Michael Humphries, the port director for the Port of Nogales.

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Drugs at Arizona border

CBP officers in Arizona found heroin, meth and fentanyl pills in one vehicle trying to enter the United States over the weekend, authorities said.  (CBP)

The drugs were allegedly hidden inside a gas tank and the side and rocker panels of a vehicle attempting to enter the United States, authorities said. 

In another bust on Saturday, authorities confiscated more than 40 pounds of drugs and another 150,000 fentanyl pills hidden inside the rocker panels of a different vehicle. 

Officers are seeing more drug smuggling attempts as the situation at the border continues to escalate. A Texas man was recently given 11 years in prison for trying to smuggle drugs inside the tires of a pickup truck. 

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That attempt came a day after he was arrested for trying to smuggle illegal immigrants into the U.S. 

Fox News' Bill Melugin contributed to this report.