U.S. President Donald Trump's special envoy Steve Witkoff held productive talks with Ukraine's senior negotiator Rustem Umerov in Miami over the past two days, U.S. officials said on Friday, with further talks scheduled for Saturday.

The office of the spokesperson at the State Department said in a Friday statement that U.S. President Donald Trump's envoy Steve Witkoff and Trump's son-in-law Jared Kushner held "constructive discussions" with the Ukrainian delegation this week on "advancing a credible pathway toward a durable and just peace in Ukraine."

Mark Rutte's comments come a day after Putin rejected US proposals for peace in Ukraine after talks with US negotiators in Moscow.

Russia launched its largest barrage of drones and missiles in a month across Ukraine, killing at least three people, Ukrainian President Volodymyr Zelensky said Saturday, as a Kyiv delegation heads to the United States for fresh peace talks.

Ukraine’s top negotiator is scheduled on Thursday to meet in Florida with U.S. special envoy Steve Witkoff, two days after the American's high-stakes meeting with Russian President Vladimir Putin in Moscow, according to a senior administration official.

Col. Gen. Vladimir Chirkin said Moscow's leadership was "unprepared" and misled into thinking 70% of Ukrainians supported Russia.

Putin also claimed that Zelensky’s European allies have pushed for demands that are “absolutely unacceptable."

In a disused warehouse at an undisclosed location in Ukraine, a military drone instructor who goes by the call sign "DC" showed CBS News a makeshift practice course that students must learn to fly the increasingly indispensable devices through before they join the country's defense against Russia.