Former Russian President Dmitry Medvedev said on Monday that it remained a mystery who was behind a wave of drone disruption in various European countries, but that the incidents served as a useful reminder to Europeans of the dangers of war.

Russia has accused the U.K. of plotting a sabotage operation in a move that shows Moscow is setting the conditions for a conflict with NATO, according to the Institute for the Study of War (ISW).

The momentum to find a peace deal between Russia and Ukraine has been exhausted since the Donald Trump - Vladimir Putin summit in Alaska, Moscow’s deputy foreign minister has said. At such a critical moment in US history, we need reporters on the ground. Your donation allows us to keep sending journalists to speak to both sides of the story.

NATO fighter jets shot down multiple Russian drones that violated Polish airspace during an attack on neighboring Ukraine early on Wednesday, as the military alliance denounced Moscow for “absolutely dangerous” behavior that ratcheted up tensions to a new level.

Russia struck two passenger trains in quick succession, first targeting a local service and then one bound for the capital, Kyiv, officials said.

Russian air defenses intercepted several Ukrainian drones heading toward the capital Moscow early Tuesday, in the second such incident within 24 hours. Moscow Mayor Sergei

President Vladimir V. Putin lashed out at “European elites” for “whipping up the hysteria” about the “Russian threat.”

Estonia is extending a fence along its border with Russia and building anti-tank ditches and bunkers in preparation for a potential conflict with Moscow.

Romania has condemned Moscow’s “irresponsible actions” after alleging that a Russian drone breached Romanian airspace during an attack on neighboring Ukraine, prompting Bucharest to scramble fighter jets.

The Ukrainian military claims its long-range drones have hit key Russian targets, including an ammunition plant, an oil terminal, and a weapons depot