"I think it's a new and a different approach," Rubio told reporters after talks with Russian Foreign Minister Sergey Lavrov. "I wouldn't characterise it as something that guarantees a peace, but it's a concept that, you know, that I'll take back to the president." He didn't elaborate

Rubio added that President Donald Trump has been "disappointed and frustrated that there's not been more flexibility on the Russian side" to bring about an end to the conflict

"We need to see a roadmap moving forward about how this conflict can conclude. And then we shared some ideas about what that might look like," he said of the 50-minute meeting. "We're going to continue to stay involved where we see opportunities to make a difference"

The two men held talks in Kuala Lumpur on the sidelines of the annual Association of Southeast Asian Nations Regional Forum, which brings together 10 ASEAN members and their most important diplomatic partners including Russia, China, Japan, South Korea, European nations and the US

The meeting was their second encounter since Rubio took office, although they have spoken by phone several times. Their first meeting took place in February in Riyadh, Saudi Arabia, as the Trump administration sought to test Russia and Ukraine on their willingness to make peace