As reported by Censor.NET citing Twitter of the Ukrainian parliament, Parubii said: "The fact that the speakers of [the parliaments of] six [European] countries have signed the letter on the inadmissibility of the Nord Stream 2 pipeline construction demonstrates the common approach and understanding of the energy threat posed by the Russian Federation to exert pressure on Europe and further extend its influence."
Nord Stream 2 is a gas pipeline project intended to secure the transport of natural gas from Russia to Germany across the Baltic Sea, bypassing transit countries.
On March 27, 2017, Naftohaz Ukrainy filed a claim to the European Court of Justice demanding European Commission to revoke its decision of Oct. 28, 2016 which allows the Russian Gazprom to significantly increase the use of OPAL gas pipeline and boost gas deliveries through the Nord Stream.
In December 2016, Ukrainian President Petro Poroshenko and Polish President Andrzej Duda made joint statement calling to review the European Commission's decision, which provided Gazprom the opportunity to increase gas supplies to Europe bypassing Ukraine.
The OPAL gas pipeline connects the offshore Nord Stream pipeline with the gas infrastructure of the Czech Republic. It started operating in 2011.