US President Donald Trump said Chinese leader Xi Jinping has agreed to restart the flow of crucial rare earth materials, after announcing a new round of US-China trade talks will be held in London on Monday.

China has agreed to fast-track approvals for the shipment of rare earth minerals to the United States and some European Union nations.

Beijing says it granted approval to some applications for the export of rare earths, a move that could ease tensions before trade negotiations between the US and China next week.