US President Donald Trump does not plan to discuss Ukraine with Russia's Vladimir Putin and China's Xi Jinping when the three meet next week in China, the White House said Friday.

The three leaders plan to meet Thursday on the sidelines of next week's Asia-Pacific Economic Cooperation (APEC) summit in China's tech hub of Shenzhen. The gathering of the heads of the world's biggest nuclear powers is described as unprecedented.

According to the White House, Trump has said that among other topics he will discuss the reduction of something, a point the source material leaves unfinished.