Seyyed Abbas Mousavi made the comments in a Wednesday interview with the state TV.
The vessel was seized by the IRGC on 20 July, just two weeks after British Royal Marines detained the Grace 1 tanker carrying Iranian oil near Gibraltar.
Iran seized the ship for engaging in dangerous manoeuvres and ignoring warnings by the Iranian coast guards after ramming an Iranian fishing boat.
Tehran previously stressed that the ship was not seized in retaliation for the seizure of the tanker Grace 1 by the UK earlier the same month.
The Russian Embassy in Iran has stated that at least one Russian national is among the released sailors. Other crew members are also from India, according to media reports.