A man works at the construction site of the so-called Nord Stream 2 gas pipeline in Lubmin, northeastern Germany, March 26, 2019. (Tobias SCHWARZ / AFP)

WARSAW - Poland has fined Russia's Gazprom more than 29 billion zlotys (US$7.6 billion) for building the Nord Stream 2 gas pipeline without Warsaw's approval, its watchdog said on Wednesday, prompting the company to say it will appeal.

Poland’s UOKiK anti-monopoly watchdog said it had also imposed a total fine 234 million zloty spread across five other companies involved in financing the US$11 billion project to double Russia’s gas export capacity via the Baltic Sea.

Poland’s UOKiK anti-monopoly watchdog said it had also imposed a total fine 234 million zloty spread across five other companies involved in financing the US$11 billion project to double Russia’s gas export capacity via the Baltic Sea

READ MORE: Gazprom defiant on fine for its pipeline

Nord Stream 2 is led by Gazprom, with half of the funding provided by Germany's Uniper and BASF's  Wintershall unit, Anglo-Dutch company Shell, Austria's OMV and Engie.

OMV and Engie face the biggest fines of 88 million zlotys and 55.5 million zlotys respectively.

Following the watchdog’s decision, the companies are obliged to terminate the agreements for financing Nord Stream 2, UOKiK said.

Gazprom said it has not violated Polish anti-monopoly regulations and will appeal against the fine.

“The UOKiK ruling breaches the principles of legality, proportionality and just trial, while the unprecedented size of the fine is a testament to the desire to oppose the Nord Stream 2 project’s implementation by any means,” Gazprom said.

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The UOKiK has been examining the project for years. In August it fined Gazprom 213 million zlotys over a lack of cooperation regarding the project.

“The launch of NS2 will threaten the continuity of natural gas supplies to Poland. An increase in the price of the product is also highly likely, with the said increase being borne by Polish consumers,” said Tomasz Chrostny, president of the UOKiK.

“Completion of this investment project increases economic dependence on Russian gas - not only in the case of Poland, but also of other European states,” Chrostny said.

Most of the gas consumed in Poland is from Gazprom, but Warsaw has reduced its reliance through LNG purchases, mostly from Quatar and the United States.

READ MORE: Germany rejects US sanctions threat over Nord Stream 2

Construction of the 1,230-kilometre Nord Stream 2 pipeline is complete barring a final stretch of roughly 120 km in Danish waters.

Work was halted in December after pipe-laying company Swiss-Dutch Allseas suspended operations because of US sanctions targeting companies providing vessels.