Turkish President Recep Tayyip Erdogan has hit back against US threats to impose sanctions on the TurkStream pipeline that is set to deliver Russian gas to Turkey and further to southern and southeastern Europe starting next year.

“Now they [the US] say ‘we will impose sanctions on TurkStream,’” Erdogan told reporters on Friday in Malaysia. “This is a complete violation of our rights,” he said, adding that Ankara would retaliate against such a step.

The TurkStream project was created as an alternative to the South Stream pipeline. The project to deliver Russian gas to southern Europe was blocked by Bulgaria in 2014 under pressure from the US.

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TurkStream is a two-string pipeline that will go from Russia along the bottom of the Black Sea to the European part of Turkey and will have a throughput capacity of 31.5 billion cubic meters. The official launch of the pipeline is scheduled for January 8, when Russian President Vladimir Putin comes to Turkey to met Erdogan.

Earlier this week, the US Senate adopted the 2020 National Defense Authorization Act, which stipulates sanctioning vessels that engaged in pipe-laying for the TurkStream project as well as punitive measures against companies working to complete the Nord Stream 2 natural gas pipeline from Russia to Germany. The bill is now on the way to the White House where President Donald Trump is set to sign it into law.

The bill also sanctions Turkey for its acquisition of the Russian-made S-400 air defense system and implies prohibiting the transfer of F-35 jets to the country​​​. Addressing the matter, the Turkish leader said these issues are “closed” and warned against treating Ankara as a “tribal nation.”

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