A U.S. military helicopter fired at the rudder ​of a Panama-flagged ship after ‌its crew ignored warnings from personnel working to enforce a ​naval blockade on Iranian ​ports, the Wall Street Journal ⁠reported on Tuesday, citing ​a U.S. official.

There were no ​immediate reports of casualties from the incident, the report said, adding ​that the ship appeared ​to be trying to transfer its crew ‌to ⁠another civilian vessel after the attack.

British maritime risk management group Vanguard and a ​maritime security ​source said ⁠earlier that according to initial assessments, the ​Panama-flagged container ship Vela ​Nova ⁠was believed to have been hit by a missile ⁠when ​sailing through the ​Gulf of Oman.

This is a developing story. Please check back for updates.