UN Secretary General António Guterres on Tuesday urged member states to avoid “confrontational rhetoric” and risk escalating a situation he views as the most dangerous crisis the world currently faces.

Speaking at a press event in New York, Guterres once again urged North Korea to adhere to its international obligations, while referencing the inflammatory back and forth between Pyongyang and Washington in August.

“Let us promote the dialogue and communication necessary to avoid miscalculation [or] misunderstanding,” the secretary general said in prepared remarks. “Confrontational rhetoric may lead to unintended consequences.”

U.S. President Donald Trump – who signaled he was not afraid to