Croatian Prime Minister Andrej Plenković has underlined that any future peace in Ukraine must be both just and sustainable, respecting the country’s territorial integrity and international law.

Plenković made the remarks on Sunday after taking part in a video conference of the “Coalition of the Willing,” a group of allied leaders discussing the path toward ending the conflict.

“I emphasized that we continue to support achieving a just and sustainable peace that will respect international law and Ukraine’s territorial integrity, along with long-term security guarantees,” the Prime Minister wrote on X.

He stressed that such guarantees were vital “to protect shared values, as well as European and global security.”

The meeting also included French President Emmanuel Macron, British Prime Minister Keir Starmer, Italian Prime Minister Giorgia Meloni, and NATO Secretary General Mark Rutte. Ukrainian President Volodymyr Zelensky joined from Brussels, where he had met with European Commission President Ursula von der Leyen before talks with EU allies on a possible peace plan.

Zelensky is scheduled to travel to Washington on Monday for a high-profile meeting with US President Donald Trump at the White House, alongside Macron, Finnish President Alexander Stubb, Meloni, Starmer, and Rutte.

The “Coalition of the Willing” brings together most major European countries, the EU, NATO, and partners such as Canada. The group is working to shape a framework for a peace settlement following recent talks between Trump and Russian President Vladimir Putin.

The United States will continue working on a scenario that could help stop Russia’s war in Ukraine, but it may not be possible, US Secretary of State Marco Rubio said on Sunday.

“If peace here proves impossible and the war simply continues, thousands of people will keep dying… unfortunately, we may have to give up on everything, though we do not want to,” Rubio said in an interview with CBS.