Russia is reinforcing its presence at a base in the Arctic Circle, including nuclear weapons pointed towards the United States, according to Norwegian Defense Minister Tore Sandvik.

President Vladimir Putin said on Sunday that Russia had tested its Burevestnik nuclear-powered cruise missile. Here are some key facts about the weapon. - The 9M730 Burevestnik, whose name translates as "storm petrel",

Russian jets violated NATO airspace over Lithuania for 18 seconds during suspected refueling exercise. Nation's president calls it a breach of international law amid tensions.

As Zelenskyy lauds Europe and the U.S. for ramping up economic pressure on Putin over the war in Ukraine, Moscow dismisses them as a counterproductive "act of war."

U.S. officials also told European counterparts that they support the EU using frozen Russian assets to buy U.S. weapons for Kyiv.

European leaders vowed to work in coordination to ratchet up the pressure on Russia as the so-called “coalition of the willing” met in London to discuss strategies to end the war in Ukraine.

Serbian Foreign Minister Marko Djuric offers to host Ukraine-Russia peace talks, citing Serbia's friendship with all parties involved in the conflict.

This cluster of quakes serves as a reminder that large subsea seismic events near Russia can trigger trans-Pacific tsunami alerts, with possible effects for Alaska, Hawaii, and the US West Coast. The pair of earthquakes that struck Saturday were both moderate in strength, measuring at 5.2 and 5.3 magnitude, according to the USGS.