A contingent of American F-35 fighter jets has arrived in Eastern Europe following Russia's military operation in Ukraine.

Russia has warned of “military and technical measures” if the US refuses to give it legally-binding security guarantees and ignores its concerns. 

US vice president Kamala Harris is slated to hold a series of meetings with American allies and partners at the Munich Security Conference next week amid soaring tensions with Russian over Ukraine.

Russia has censured as “a provocation” a reported Ukrainian request for Terminal High Altitude Area Defense (THAAD) missile systems from the United States, stressing that considering such supplies would deal a setback to efforts to ease an ongoing crisis between Moscow and the West over Ukraine.

Another contingent of US troops land in southeastern Poland near the border with Ukraine as part of efforts to reinforce NATO’s military buildup in eastern Europe.

US President Joe Biden is considering deploying thousands of troops, as well as warships and aircraft, to Eastern Europe and the Baltic States.

NATO member countries are putting their forces on standby and reinforcing the deployment of weaponry in eastern Europe amid escalating tensions between Russia and the US over Ukraine.