A crane removes a container from a ship at the Port of Baltimore’s Seagirt Marine Terminal on March 1. (AP Photo/Patrick Semanksy)

Federal authorities seized 147 pounds of cocaine from a shipping container at the Port of Baltimore earlier this month.

Customs and Border Protections officers found the drugs using non-intrusive techniques to scan a shipment of lumber from Brazil, the agency said, according to Baltimore CBS affiliate WJZ. Upon opening the container, they discovered two gym bags bearing 57 bricks of the white, powdery substance, valued at more than $4 million.

“Narcotics interdiction remains a top Customs and Border Protection enforcement priority, and this case illustrates how CBP officers leverage non-intrusive imaging technologies to intercept dangerous drugs and to help keep our communities safe,” Dianna Bowman, CBP area port director for the port of Baltimore, said in a statement.

According to WJZ, the cocaine seizure was the port’s largest since officers uncovered more than 300 pounds of the drug in a refrigerated container from Ecuador in 2007.