There are too many drones and only so many frequencies. Friendly jamming happens, sometimes as an accident, sometimes in panic.

Trump sounded positive on Monday as he met with Ukrainian President Volodymyr Zelenskyy and European leaders at the White House, just two days after his summit with Russia's Vladimir Putin in Alaska. "I think President Putin will make peace. I think President Zelensky will make peace. We'll see if they can get along," Trump said.

Russia said on Wednesday attempts to resolve security issues relating to Ukraine without Moscow's participation were a "road to nowhere", sounding a warning to the West as it scrambles to work out guarantees for Kyiv's future protection.

NATO aircraft scrambled from Romania following a large-scale Russian attack on across Ukraine overnight, including in the Odesa region near Danube River border with allied nation.

Russian troops currently control about 20% of Ukrainian territory, but the Ukrainian constitution forbids giving up territory or trading land.

As negotiations over the war carry on, President Vladimir Putin is pushing hard with tactics that have evolved over three and a half years.

Hungary has offered to host peace talks between Russia and Ukraine twice, and the offer still stands, Hungarian Foreign Minister Peter Szijjarto said in a podcast broadcast on Facebook on Thursday.

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.

U.S. President Donald Trump says he has called Russian President Vladimir Putin and begun to arrange a meeting between Putin and Ukrainian President Volodymyr Zelenskyy, a critical step toward bringing a possible end to Russia's war on Ukraine.

Ukrainian officials say more than 19,000 children have been unlawfully deported to Russia or occupied areas, with reports suggesting the number could be far higher.

Ukraine and its allies are discussing proposals, including a collective agreement similar to NATO's Article 5.