The British Foreign Secretary, Liz Truss, is set to visit Moscow in February for discussions with her Russian counterpart, Sergei Lavrov, according to the RIA news agency, citing a diplomatic source.

The planned visit comes at a time when Russia and the West are at odds over Ukraine. This week, Lavrov and US Secretary of State Antony Blinken made little progress in their meetings on the matter, but they decided to keep talking in order to settle a situation that has fueled concerns of a military clash.

“The British Foreign Secretary has requested permission to fly to Moscow for discussions with Lavrov. The visit has been scheduled for February in Moscow “According to RIA’s source.

Russia’s foreign ministry did not immediately respond to a Reuters’ request for comment.

Britain and its NATO allies have expressed deep concern over Russia’s military build-up on the border with Ukraine and have warned it of severe economic consequences if it invades.

Russia denies plans to invade Ukraine but is demanding legally binding security guarantees from the United States and NATO.

Britain said on Monday it had started supplying Ukraine, which is not a member of the NATO alliance, with anti-tank weapons to help it defend itself from a potential invasion.

Speaking in Australia earlier this week, Truss said Britain and its allies must respond together to global threats, deepen ties with democracies in the Indo-Pacific and “face down global aggressors” who were using economic dependence to try to get what they want.