The US State Department says its officials have conveyed the United States' concerns to China over recent incidents between the two nations' militaries in the Taiwan Strait and South China Sea.

The State Department says Assistant Secretary of State for East Asian and Pacific Affairs Daniel Kritenbrink met with China's Vice Foreign Minister Ma Zhaoxu and others in Beijing on Monday.

The meeting comes amid growing concerns over what the US calls "dangerous encounters" between the US and Chinese forces.

A Chinese fighter jet passed in front of a US reconnaissance aircraft over the South China Sea on May 26.

A Chinese warship crossed in front of a US destroyer in the Taiwan Strait on Saturday.

The US military has released a video showing an "unsafe maneuver" by the Chinese vessel that it says could have led to an unintended clash.

White House National Security Council spokesperson John Kirby spoke to reporters on Monday.

Kirby said, "It won't be long before somebody gets hurt." He added, "It wouldn't take much for an error in judgement or a mistake to get made."

He also called for the resumption of a US-China military line that was shut down in August.

Kirby later noted, "we are feeling like we are making progress in terms of opening up additional lines of communications."