The New York Times, citing US officials, reported that companies in China shipped dual-use materials to Iran that could be used for both civilian and military purposes.
Officials said the shipments have raised concerns in Washington about their potential applications.
US officials said China is taking a cautious approach to the war involving Iran and has not adopted a firm position due to competing strategic interests.
They added that President Donald Trump wants to engage China from a position of strength rather than amid an unresolved conflict.
