The state-owned shipbuilder said the project, its first attempt to build crude oil tankers, would be delayed for months due to its "financial difficulties", the company said in a government report.
The delivery of the first vessel, which was planned to transport crude oil for Dung Quat, was already delayed by nearly a year.
Deputy Prime Minister Hoang Trung Hai said in the report the government would ask Petrovietnam, the vessels' buyer, to advance more fund to help speed up the project.