A Iranian businessman Bijan Dadfar and an oil industry consultant, Abbas Yazdi, were also named as suspects in the case.
Dadfar has died since the probe began while Yazdi, who is also believed to be dead, was sentenced to four years imprisonment in the absence of any death certificate.
The ruling comes four months after Total announced that it was pulling out of the South Pars project for fear of being caught out by US sanctions after US President Donald Trump pulled out of an international nuclear deal with Tehran.
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