Liner operators are facing "substantial economic costs" from severe congestion at two key ports in Venezuela, Miami-based Seaboard Marine says.



In a note to shippers, the containership company says port clogs at Puerto Cabello and La Guaira have continued for several months.



Puerto Cabello has suffered severe congestion, Seaboard says.
Venezuelan officials say they are working to address the customs backlog for containers, but Seaboard says it is unclear when a resolution will be found.



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