Secretary of State Marco Rubio relayed President Donald Trump’s “disappointment and frustration” during a “frank conversation” with Russian Foreign Minister Sergey Lavrov in Malaysia on Thursday but new ideas to drive an end to the conflict were also discussed,

The conclusion follows a meeting between US Secretary of State Marco Rubio and Russian Foreign Minister Sergey Lavrov on July 10 in Kuala Lumpur, Malaysia. Rubio said he used the meeting to convey President Donald Trump’s frustration with Russia’s lack of “flexibility” on ending the war.

The U.S. secretary of state met with his Russian counterpart on the sidelines of a gathering of Southeast Asian nations, where he also defended new U.S. tariff threats.