U.S. President Joe Biden said last week just such an invasion was “a distinct possibility” sometime in February. NATO and Washington have rejected Moscow’s demands outright but have offered further talks on issues such as disarmament pacts and establishing rules for staging military exercises.

SOCAR Enerji Ticaret AŞ, a subsidiary of Azerbaijan’s state energy firm SOCAR, will supply Turkey with 4 million cubic metres (mcm) of natural gas per day in February.

The contents of replies from the United States and NATO were not disclosed. But Secretary of State Antony Blinken has said Washington had made clear its “core principles” and could not accept any notion of a Russian veto on NATO membership and on the choice of alliance partners to be made by Ukraine.