India, Sept. 13 -- The American space agency NASA has barred Chinese nationals, who have valid US visas, from its facilities and networks, media reports said.

Chinese nationals, who until now could work at NASA as contractors or contribute to its research, were informed on Sept. 5 that their access to the agency's systems and facilities had been revoked, reported The Epoch Times.

The move has been taken amid a heightened number of cases where Chinese nationals were allegedly found spying for Beijing.

Chinese doctor accused of trying to smuggle cancer research from US to China

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