A US navy destroyer fired three warning shots towards four of Iran ships on Sunday.
According to Reuters, USS Mahan fired warning flares and a US navy helicopter also dropped a smoke float before the warning shots were fired at four Iranian fast-attack vessels.
The Iranian vessels came within 900 yards of the Mahan, which was escorting two other US military ships.
The incident comes as Donald Trump is about to take office on 20 January. In September, Trump vowed that any Iranian vessels that harass the US navy in the Gulf would be “shot out of the water”.