The deputy head of Russia’s Gazprom Company, Alexander Medvedev, earlier said that the deal was scheduled to be finalized before the end of this month, along with an intergovernmental agreement on the implementation of the TurkStream project.
Turkish officials have said another sticking point in the talks has been Russia's insistence that Ankara grant permits for the construction work on four planned lines in the project. Turkey has so far only given licenses for the first line.
Russia’s Energy Ministry earlier sent Ankara its own version of the agreement, which is still being studied by the Turkish government.
TurkStream is supposed to bring 63 bcm of gas per year to Turkey and to southern Europe via Greece by 2020. The first phase of pipeline was expected to be operational by 2017 and to carry 15.75 bcm of gas.