That's according to Russia's President Vladimir Putin, speaking at his annual press conference Thursday, TASS reported.
"We need guarantees in writing from the European Commission, that all routes including the potential one to Europe through Turkey may not only be realized, but will become a priority with the EC's support. If Gazprom's Turkish partners bring us a document of this sort, we can move on. Unfortunately, it hasn't happened for now," the President said, underlining that the project's fate depends on other sides, not just Russia.