U.S. Customs and Border Protection (CBP) officers working at Los Angeles International Airport (LAX) said they seized over 4.6 pounds of opium concealed inside baggage Jan. 13.

CBP officers at Terminal 2 said they prevented a suspected attempt to smuggle the opium after referring an Iranian national, who is a legal U.S. permanent resident and was arriving from London, for secondary baggage examination.

During their inspection, CBP officers noticed that the passenger’s hand carry bag was unusually heavy after all of the contents had been removed, a CBP spokesman said.

The bag was then x-rayed and revealed an anomaly within the lining of the bag. When the lining was removed, CBP officers found four packages wrapped in black plastic containing substance which tested positive for opium, the CBP spokesman said.

“This is another prime example of the daily vigilance of our CBP officers at LAX,” said CBP Acting Director of Los Angeles Field Operations Carlos Martel. “I commend their dedicated efforts which often result in interceptions of contraband and prohibited items at the frontline of our borders,”

CBP officers seized the drug and turned it and the suspect over to U.S. Immigration and Customs Enforcement (ICE) Homeland Security Investigations, according to the CBP spokesman.