The boss of Nvidia says he is "disappointed" that China has reportedly ordered its top technology companies to halt purchases of the firm's artificial intelligence (AI) chips.

Jensen Huang told BBC News the US needs "to make sure that people can access this technology from all over the world, including China."

He added: "The advance of human society is not a zero-sum game."

Mr Huang is one of a number of tech bosses, including Microsoft's Satya Nadella, accompanying US President Donald trump on his state visit to the UK.

"President Trump is very clear," Mr Huang said. "He wants America to win, and President Xi wants China to win, and it's possible for both of them to."