Latvijas Dzelzcels spokesman Maris Ozols said that VNT was not unloading cargo from the trains, but could not explain the reasons why situation.
Ozols said he would ask the VNT stevedores.
VNT spokeswoman Elina Dobulane told BNS that the terminal was running out of free storage space and that its possibilities to receive products delivered by the trains were therefore limited.
"Because of this reason, Latvijas Dzelzcels has banned further deliveries to VNT until the situation improves," Dobulane said, adding that the congestion was caused by a high amount of oil products accumulated at the terminal, which was normal for the season.
"'All the parties concerned are working to deal with the situation as soon as possible," she said.
VNT, a subsidiary of Latvia's Ventspils Nafta holding company, provides transit services -- receipt, storage and loading of crude oil and petroleum products via pipelines, rail tank-cars and tankers.