U.S. Secretary of State Marco Rubio says the United States and Russia are testing a fresh approach to peace in Ukraine following his meeting with Russian Foreign Minister Sergey Lavrov in Malaysia on Thursday.

US Secretary of State Marco Rubio and his Russian counterpart met Thursday in Malaysia as tensions between the countries rise over Moscow’s increasing attacks on Ukraine and whether Russia’s leader is serious about a peace deal.

The US secretary of state said on Thursday 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 Moscow's ongoing all-out war in Ukraine.