Vladimir Putin is demanding that Ukraine give up all of the eastern Donbas region, renounce ambitions to join NATO, remain neutral and keep Western troops out of the country, three sources familiar with top-level Kremlin thinking told Reuters.

Two German fighter jets were scrambled to the Romanian-Ukrainian border on Tuesday night in response to a Russian drone attack in the frontier region.

"In connection with the activity of long-range aviation of the Russian Federation, conducting strikes on Ukrainian territory – including with the use of hypersonic missiles – aircraft of the Polish Air Force and allied aviation are operating in Polish airspace,

Russia said Wednesday attempts to resolve security issues relating to Ukraine without Moscow's participation were a "road to nowhere," and that much diplomatic work needs to be done before Vladimir Putin and Volodymyr Zelenskyy are ever in the same room.

Poland has delivered a note of protest to the Russian Embassy in Warsaw after a drone exploded inside the NATO member's borders. A spokesman for Poland's Foreign Ministry said: "This afternoon, a note of protest was delivered to the Embassy of the Russian Federation regarding the events that took place in Osinie on the night of August 19-20,

One of these threats, and one notoriously hard to pick up, is Russian submarines. Climate change is making the task of finding them even more difficult. As the planet heats up, fresh water is seeping into the Arctic Ocean as the sea ice and the permafrost melts,

As Trump pushes for peace, Ukraine accuses Russia of a deadly drone and missile strike, "as if there were no efforts by the world to stop this war."