Secretary of State Rex Tillerson Rex Wayne TillersonGary Cohn: 'I haven't made up my mind' on vote for president in November Kushner says 'Alice in Wonderland' describes Trump presidency: Woodward book Conspicuous by their absence from the Republican Convention MORE has come out in opposition to a gas pipeline that would connect Russia and Germany, saying Saturday that the plan would hinder U.S. and European goals in the region.

The Nord Stream 2 pipeline would provide Germany and central Europe with Russia's gas supply.

Germany and the Czech Republic have insisted on the economic benefits of the pipeline, while Tillerson and key European allies such as Poland have pointed to the pipeline as an intrusion.

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"Like Poland, the United States opposes the Nord Stream 2 pipeline. We see it as undermining Europe's overall energy security and stability," Tillerson said alongside Polish Foreign Minister Witold Waszczykowski at a press conference in Warsaw. "Our opposition is driven by our mutual strategic interests."

Poland is working to diversify its energy supplies and lessen its dependence on Russia's oil exports. Russia has stirred tension in the region by its annexation of the Crimean Peninsula in Poland's neighboring Ukraine.

The pipeline would run from Russia through the Baltic Sea, which borders Poland to the north.

“We are proud to support Poland’s energy diversification and security,” Tillerson added.

Tillerson's comments come just days after he spoke with the top diplomat for Russia, after blaming the country for failing to halt the use of chemical weapons in Syria.