A source in Iran did not want to reveal his name revealed so Iran demanded Sweden to hand over several Iranian political activists living in Sweden to Iran.
A secret person in Iran did not want to reveal his name revealed that the Iranian regime required Sweden to surrender several people to Iran so that Iran could release the Swedish oil ship.
The same source has said when Mohammed Javad Zarif visited the Foreign Minister of the Iranian terrorist regime Sweden has said the same thing to Swedish politicians so if Sweden wants Iran to be released Stina oil Ship, then Sweden should do things as Iran wants and it is Sweden must hand over several people who lives in Sweden to Iran.