The ship was reportedly heading north at the time of the attack.
The incident, Sky News reported, was reported to the British Maritime Trade Operations Centre.
Iran has since effectively closed this key maritime route to commercial traffic, although it occasionally allows passage to individual ships, reportedly for certain fees.
Since then, there have been a number of attacks on ships, as Iran attempts to enforce the blockade, including using the so-called "mosquito fleet," or less armed ships.
