Sri Lanka, April 12 -- US President Donald Trump warned that China would face a 50% tariff if it transfers weapons to Iran, but said he doubted Beijing would do so, despite US intelligence indicating it had such plans.

"I hear news reports about China giving the shoulder missiles, what's called the shoulder missile, anti-aircraft missile," he said, appearing to reference exclusive CNN reporting that Beijing is preparing to transfer shoulder-fired anti-air missile systems known as MANPADs.

"I doubt they would do that, because I have a relationship, and I think they wouldn't do that," he told Fox News' "Sunday Morning Futures with Maria Bartiromo."

"Maybe they did a little bit at the beginning, but I don't think they would anymore," he s...