MIAMI (CBSMiami) – More than 4,000 pounds of marijuana will not make it to the streets of South Florida after it was seized at Miami Seaport.

U.S. Customs and Border Protection (CBP) officers working at the Miami Seaport seized 4,300 pounds of marijuana in a single shipment on March 1st.

CBP officers were conducting an initial inspection of containers on a vessel that had arrived from South America. During the inspection, the officers noticed one of the containers had been tampered with.

After a CBP K-9 alerted to the presence of the narcotics, officers opened the container to find numerous sacks filled marijuana.

A total of 40 sacks of marijuana were found.

The drugs have a street value of approximately $4 million dollars, making it the largest find for the Miami Seaport.

CBP officers have intercepted shipments of about 3,800 pounds during previous seizures.

“Every day the men and women of Customs and Border Protection work diligently to protect our borders to prevent the importation of contraband through our ports of entry. Customs and Border Protection at the Port of Miami works very closely with our law enforcement and security partners to disrupt and ultimately close off pathways through which narcotics are introduced into the United States,” said CBP Miami Office Of Field Operations Director Vernon Foret.

The case is being investigated by U.S. Immigration and Customs Enforcement’s Homeland Security Investigations. No arrests have been made.