Bond.az reports that Iranian personnel seized a ship off the United Arab Emirates and took it toward Iranian waters.
The White House said President Trump and China's President Xi agreed on the need to keep the Strait of Hormuz open.
China, Iran's top oil buyer, has largely been shut out of the strait since the U.S.-Israeli war began.
An Indian cargo ship was sunk, with 14 crew rescued. UKMTO reported unauthorized boarding of a vessel near Fujairah, heading to Iran.
Trump and Xi also agreed Iran should never get nuclear weapons.
