The top diplomats of the two superpowers met at an undisclosed location on the sidelines of a global security conference in Munich, just hours after Wang scolded Washington as "hysterical" in a running dispute over the US downing of a suspected Chinese spy balloon.

Relations between the two countries have been fraught since Washington said China flew a spy balloon over the continental US before American fighter jets shot it down on President Joe Biden's orders. The dispute also came at a time when the West is closely watching Beijing's response to the Ukraine war.

In an interview to be aired on Sunday morning on NBC News' "Meet the Press with Chuck Todd," Blinken said the United States was very concerned that China is considering providing lethal support to Russia and that he made clear to Wang that "would have serious consequences in our relationship."

"There are various kinds of lethal assistance that they are at least contemplating providing, to include weapons," Blinken said, adding that Washington would soon release more details.

Wang told Blinken the United States must "face up to and resolve the damage" to bilateral relations "caused by the indiscriminate use of force", according to a brief statement on Sunday by China's Ministry of Foreign Affairs.

Wang was referring to the recent shootdown of what the United States called a spy balloon but Beijing said was a weather-monitoring craft.

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