Strait of Hormuz, Iran and Chinese shipping
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Tracking data analysed by BBC Verify shows at least four ships linked to Iran have crossed the waterway, after the start of a US blockade on Iranian ports.
Two Navy guided-missile destroyers entered the Strait of Hormuz on Saturday, the first American warships to transit the strait since the U.S.-Israel offensive in Iran began on Feb. 28. USS Frank E. Peterson (DDG-121) and USS Michael Murphy (DDG-112) are now in the Persian Gulf after transiting the strait as part of the U.
President Donald Trump said the U.S. military would remain around Iran until a real agreement is reached and fully complied with.
The US says it will allow ships through the Strait of Hormuz - if they are not going to or from Iranian ports. Tracking data showed at least two tankers passing through on Tuesday.