The US energy security bill poses a threat to the "Turkish Stream" gas pipeline, the European part of which may not be unclaimed, Reuters reported.

If the American bill becomes a law, European companies may abandon the construction of the infrastructure leading to the Russian magistral. In this case, South Europe will have to buy more expensive liquefied gas, analysts believe.

In spite of the risks connected with the bill, Gazprom completes the construction of the Turkish stream gas pipeline- replacement for the South Stream pipeline. With the help of it, Moscow hopes to begin selling gas to the south and southeast of Europe in a year, bypassing Ukraine, the transit contract with which expires at the end of 2019.

The construction of two sections of the Turkish stream has been completed by 80%, therefore, possible US sanctions  will not have any notable effect, analysts note.

"If Washington succeeds in selling its gas to the south of Europe, it may damage Russia's gas exports through the Turkish Stream," Maria Belova, head of research at VYGON Consulting, considers.