New Delhi, Oct. 9 -- Beijing has reportedly requested New Delhi's guarantee that India will not re-export the heavy rare earth magnets, exported from China, to the United States, ensuring domestic use strictly within India, media reports said.

Rare earth magnets are key inputs in sectors like electric vehicles and defence.

China controls 90 percent of the world's production of heavy rare earth and the demand for stricter regulations has led to further supply delays.

The report said diplomatic engagement between the two countries in underway on the matter.

Although China resumed exports of light rare earth magnets to India following the Shanghai Cooperation Summit in August, shipments of heavy rare earth magnets remain suspended.

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