Iranian state media says a journalist for The Washington Post detained since July has been indicted.
Citing a prosecutor, the official news agency IRNA reported that Jason Rezaian would stand trial in Iran's Revolutionary Court.
The charges against the newspaper's Tehran bureau chief, who holds dual U.S.-Iranian citizenship, have not been made public.
While in Geneva for talks with U.S. Secretary of State John Kerry, Iranian Foreign Minister Javad Zarif told reporters earlier Wednesday that the Iranian judiciary, not the government, would resolve Rezaian's case.
The envoy said the government was providing "all of the humanitarian assistance that we could," but "this is a judicial matter, so we will have to wait for the judiciary to move forward."
The U.S. State Department said Kerry brought up Rezaian's case with Zarif during their talks, telling the Iranian foreign minister that he desired to see the reporter back with his family.