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Russia, China, India and the United States have tested antisatellite missiles, and several major world powers have developed technology meant to disrupt signals in space.

A White House spokesman said on Thursday that antisatellite technology being developed by Russia had not been deployed and posed “no immediate threat to anyone’s safety.”

A current and a former U.S. official said the new intelligence was related to Russia’s attempts to develop a space-based antisatellite nuclear weapon.

Russia is also training its military and deploying new antisatellite weapons “to disrupt and degrade U.S. and allied space capabilities.”

China has been seeking mastery of the space domain since its 2007 test of an antisatellite weapon.