U.S. Ambassador to NATO Matthew Whitaker, said prospects for ending the Russia-Ukraine conflict have improved significantly, calling the current moment "the best opportunity" yet to achieve peace.

Speaking to Spain's EFE news agency, Whitaker noted any settlement must be acceptable to Kyiv and backed by a "sincere desire" from Moscow to halt hostilities.

Whitaker also addressed broader security concerns in remarks delivered at a forum in Qatar. He said he does not believe Russia intends to attack NATO, describing the likelihood of such an action as "very low."

He stressed the alliance, including the United States, remains committed to its collective-defense obligations under Article Five.

His comments follow recent statements by Admiral Giampaolo Di Paola Cavo Dragone, head of NATO's Military Committee, who said the alliance does not rule out the possibility of a "preemptive strike" against Russia — an action he argued could be interpreted as defensive.

Trump's advisers and Ukrainian officials meet for a third day of talks Saturday after making progress on finding agreement on a security framework for postwar Ukraine.

The two sides also offered the sober assessment that any "real progress toward any agreement" ultimately will depend "on Russia's readiness to show serious commitment to long-term peace."

The statement from U.S. special envoy Steve Witkoff, Trump's son-in-law Jared Kushner as well as Ukrainian negotiators Rustem Umerov and Andriy Hnatov came after they met for a second day in Florida on Friday.

They offered only broad brushstrokes about the progress they say has been made as Trump pushes Kyiv and Moscow to agree to a U.S.-mediated proposal to end nearly four years of war.

"Both parties agreed that real progress toward any agreement depends on Russia's readiness to show serious commitment to long-term peace, including steps toward de-escalation and cessation of killings," the statement said. "Parties also separately reviewed the future prosperity agenda which aims to support Ukraine's post-war reconstruction, joint U.S.–Ukraine economic initiatives, and long-term recovery projects."

The U.S. and Ukrainian officials also discussed "deterrence capabilities" that Ukraine will need "to sustain a lasting peace."

Witkoff and Kushner's talks in Florida with Umerov, Ukraine's lead negotiator, and Hnatov follow discussions between President Vladimir Putin and the U.S. envoys at the Kremlin on Tuesday.

Friday's session took place at the the Shell Bay Club in Hallandale Beach, a high-end private golf and lifestyle destination owned by Witkoff's real estate development company.

Previous diplomatic attempts to break the deadlock have come to nothing and the war has continued unabated. Officials largely have kept a lid on how the latest talks are going, though Trump's initial 28-point plan was leaked.

Ukrainian President Volodymyr Zelenskyy said his country's delegation in Florida wanted to hear from the U.S. side about the talks at the Kremlin.

Zelenskyy, as well as European leaders backing him, have repeatedly accused Putin of stalling in peace talks while the Russian army tries to press forward with its invasion. Zelenskyy said in a video address late Thursday that officials wanted to know "what other pretexts Putin has come up with to drag out the war and to pressure Ukraine."

Speaking to Russian journalist Pavel Zarubin on Friday, Kremlin foreign affairs adviser Yuri Ushakov praised Kushner as potentially playing an important role in ending Russia's invasion of Ukraine. Ushakov also took part in Tuesday's talks at the Kremlin.

"If any plan leading to a settlement is put on paper, it will be the pen of Mr. Kushner that will lead the way," Ushakov said.

The flattering comments about Kushner by the senior Russian official come as Putin has sought to sow division between Trump and Ukraine and Europe at a moment when Trump's impatience with the conflict is mounting.

Putin said his five-hour talks this week with Witkoff and Kushner were "necessary" and "useful," but some proposals were unacceptable.

Kushner, who is married to Trump's daughter Ivanka, was a senior adviser to Trump during his first term and was the president's point person on developing the Abraham Accords, which formalized commercial and diplomatic ties between Israel and a trio of Arab nations.

Kushner has played a more informal role in Trump's second go-around, but he helped Witkoff close out ceasefire and hostage negotiations between Israel and Hamas this fall. Trump tapped Kushner again to pair up with Witkoff to try to find an endgame to Russia's invasion of Ukraine.

Ushakov, who accompanied Putin on a visit to India on Friday, repeated the Russian president's recent criticism of Europe's stance on the peace talks. Kyiv's European allies are concerned about possible Russian aggression beyond Ukraine and want a prospective peace deal to include strong security guarantees.

Kyiv's allies in Europe are "constantly putting forward demands that are unacceptable to Moscow," Ushakov told Russia's state-owned Zvezda TV. "Putting it mildly, the Europeans don't help Washington and Moscow reach a settlement on the Ukrainian issues."

French President Emmanuel Macron said Friday that he made progress during a visit to Beijing on getting Chinese leader Xi Jinping's support for peace efforts.

"We exchanged deeply and truthfully on all points, and I saw a willingness from the (Chinese) president to contribute to stability and peace," Macron said.

The French president said he stressed that Ukraine needs guarantees that Russia won't attack it again if a settlement is reached and that Europe must have a voice in negotiations.

"The unity between Americans and Europeans on the Ukrainian issue is essential. And I say it, repeat it, emphasize it. We need to work together," Macron said.

The Associated Press contributed to this report.