Nazanin Zaghari-Ratcliffe is one of several dual nationals held in Iran by hard-liners in the country's judiciary and security services on espionage charges, likely to be used as bargaining chips in future negotiations with the West.
Zaghari-Ratcliffe, who works for the Thomson Reuters Foundation, the charitable arm of the news agency, found out this weekend her final appeal to Iran's supreme court had been denied, her husband Richard Ratcliffe said in a statement.
She still has not been allowed to know the exact charges for which she was convicted, Ratcliffe said.
"It is a not such a surprise that this final appeal failed. We have had two secret trials and now a closed panel review," he said. "But it is still nonsense that even at this stage Nazanin still does not have firm details of the charges against her."
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Iranian news agencies have said Zaghari-Ratcliffe was convicted of plotting the "soft toppling" of Iran's government. Her family says Iran's paramilitary Revolution Guard tried to get her to confess on camera she trained and recruited spies, something she refused.
There was no immediate reaction from Tehran on Zaghari- Ratcliffe. Iran does not recognize dual nationality and rarely allows consular visits to dual nationals in Iranian jails. Among the dual nationals known to be held in Iran are Iranian-American businessman Siamak Namazi and his octogenarian father, Baquer Namazi, who are serving 10-year prison sentences for "cooperating with the hostile American government." Iranian-American Robin Shahini is serving an 18- year prison sentence for "collaboration with a hostile government," though he recently received bail .
Still missing is former FBI agent Robert Levinson , who vanished in Iran 10 years ago while on an unauthorized CIA mission.