New Delhi, Oct. 11 -- China's commerce ministry announced new controls on the export of rare-earth technologies and items on Thursday, tightening regulations on a key industry that supplies most countries with critical materials.

China is a leading producer and exporter of rare-earth minerals, which are used to make the magnets crucial to the auto, electronics and defence industries.

China's rare earth decision has triggered panic in the US amid its already straining relationship with Beijing, with President Donald Trump imposing additional tariffs on the country despite cracking a trade deal earlier this year.

Here are all your questions answered on the latest Trump tariffs on China and Beijing's decision to put curbs on rare earth ex...