By Robin Emmott

BRUSSELS (Reuters) – U.S. Secretary of State Antony Blinken said on Wednesday he had told his German counterpart that sanctions against the Nord Stream 2 natural gas pipeline were a real possibility and there was “no ambiguity” in American opposition to its construction.

Berlin has so far been betting the new U.S. administration of President Joe Biden will take a pragmatic approach to the project to ship Russian gas to Europe because it is almost completed, officials and diplomats have told Reuters.

Reiterating Biden’s concerns about the pipeline from Russia to Germany, Blinken said he told German Foreign Minister Heiko Maas on Tuesday in a private meeting that companies involved in the project risked sanctions, particularly at a point when construction might finish.

“I made clear that firms engaged in pipeline construction risk U.S. sanctions. The pipeline divides Europe, it exposes Ukraine and central Europe to Russian manipulation and coercion, it goes against Europe’s own stated energy goals,” Blinken told a news conference.

The Kremlin says Nord Stream 2, a $11 billion venture led by Russian state energy company Gazprom, is a commercial project, but several U.S. administrations have opposed the project and Europe has vowed to reduce its reliance on Russian energy.

The United States and eastern European Union countries such as Poland say Nord Stream 2 is part of Russian economic and political measures to manipulate European countries and undermine transatlantic ties.

“What I said (to Maas) was that we will continue to monitor activity to complete or certify the pipeline and if that activity takes place, we will make a determination on the applicability of sanctions,” Blinken said.

He said it was important to carry the message directly to Maas, “just to make clear our position and to make sure there is no ambiguity.”

Reuters reported on Feb. 24 that 18 companies recently quit work on the pipeline to avoid sanctions.

Asked about a possible compromise in which Germany’s energy grid regulator could be empowered to stop gas flowing if Russia crossed a line, Blinken declined to comment.

Last month, a former German ambassador to the United States floated the idea of a compromise between Washington and Berlin that would have given the completed pipeline a use as political leverage.

Triggers for what the former envoy, Wolfgang Ischinger, called an “emergency brake” might include a flare-up in violence between Ukraine and Russia, which annexed Ukraine’s Crimea peninsula in 2014, or if Moscow sought to undermine Kyiv’s existing gas transit infrastructure.

(Reporting by Robin Emmott; Editing by Andrew Heavens and Edmund Blair)