Russian shipbuilder Severnaya Verf has pushed up net earnings in the first quarter as revenue more than doubled.

The St Petersburg plant has logged profit of RUB 1.09bn ($16.23m) to 31 March, against a loss of RUB 398.95m in the same three months of 2015.

Revenue soared to RUB 5.18bn from RUB 2.51bn year-on-year.

Operating profit was up at RUB 1.23bn from RUB 134.31m.

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