The trial of Washington Post reporter Jason Rezaian resumed Monday in Tehran, in what could be the final hearing before a judgment is issued on whether he spied on Iran.

The 39-year-old Iranian-American has been in custody for more than a year and his trial has been held behind closed doors. His family and employer have denounced the proceedings as a sham.

The official IRNA news agency reported that the latest hearing, the first since Iran struck a nuclear deal with the United States and other world powers, was under way but gave no other details.

Rezaian's lawyer Leila Ahsan has said she was told that Monday's court appearance -- the reporter's fourth -- would be the last but she could not "be 100 percent sure."

Iran and the United States have said there is no linkage between the charges against Rezaian and the nuclear talks but American officials and lawmakers have called for the reporter's release.

Ahsan on July 28 said she hoped the accord -- in which Iran agreed to curb its nuclear programme in return for the lifting of crippling sanctions imposed by the West -- would hasten her client's release.

But on Sunday, a top Iranian judicial official appeared to cast doubt on when the trial would end.

"The court decides which hearing will be the last one," said Gholam Hossein Esmaili, chief of Tehran's justice department.

"Until then one cannot judge about it."

Rezaian's trial, on charges of "espionage, collaboration with hostile governments, gathering classified information and disseminating propaganda against the Islamic republic," started in May.

The case has been heard by a Revolutionary Court, which usually presides over political cases or those related to national security.

Rezaian, the Post's Tehran correspondent, was arrested with his wife Yeganeh Salehi, also a journalist, at their home in Tehran on July 22, 2014.

Salehi and a photographer who was arrested on the same day were released on bail after two and a half months in custody.

Rezaian's wife has not worked since and she is barred from discussing the case.

Washington Post executive editor Martin Baron on Saturday criticised the trial and the conditions of Rezaian's incarceration.

"Iran has behaved unconscionably throughout this travesty of a case," he said.

"It has imprisoned an innocent journalist for more than a year and subjected him to physical mistreatment and psychological abuse.

"The secret court proceedings that began on May 25 have been a farce."

Requests that Rezaian be released on bail have been refused.
Source: AFP