TEHRAN, Iran – An Iranian-American academic imprisoned for months and accused of trying to create a “soft revolution” in Iran was permitted to leave the country and rejoin her family, her lawyer and family said today.

Haleh Esfandiari, 67, who was released on bail in August, picked up her passport and flew late yesterday from Iran to Austria, where her sister lives, said her daughter, Haleh Bakhash.

She plans to stay in Austria, where she will be reunited with her husband, for a week before heading home to America, Ms. Bakhash said.

“She had some indication that she would get her passport back but she didn’t know when. It was a complete surprise to all of us, and a relief,” Ms. Bakhash told The Associated Press from her home in Washington.

The unexpected development came after Iranian President Ahmadinejad said last week that his government was not opposed to Ms. Esfandiari’s departure, but that the the Iranian judiciary would have to sort out the issue.

Ms. Esfandiari’s family and the Woodrow Wilson International Center for Scholars, where she is head of the Middle East program, have denied the allegations against her.

Though Ms. Esfandiari got back her passport, which authorities first seized in January, her daughter was unclear whether charges against her remained.

“We don’t know where any of that stands. We know she is free to go and got her passport back,” Ms. Bakhash said.

Her lawyer in Iran, Abdol Fattah Soltani, told The Associated Press that Esfandiari got her passport and left Iran afterward, but he had no more details.

Last month, another lawyer for Ms. Esfandiari, Nobel Peace Prize laureate Shirin Ebadi, said there was no legal obstacle standing in the way of her client rejoining her family back in America, but she has to return to Iran to stand trial over charges of endangering national security.

Ms. Esfandiari was released on bail Aug. 21 from Tehran’s notorious Evin prison where she was held since May. Her 93-year-old mother used the deed to her Tehran apartment to post bail.

Iranian judiciary officials have not provided answers on Ms. Esfandiari’s legal status since the release. She may still have to stand trial or return to Iran to appear in court.

The Iranian Intelligence Ministry had accused her and her organization of trying to set up networks of Iranians with the ultimate goal of creating a “soft revolution” in Iran. Her family and the Wilson Center have denied the allegations.

Ms. Esfandiari was one of a handful of Iranian-Americans detained or facing security-related charges here. The detentions have sharply added to tensions between America and Iran.

Washington accuses Iran of arming Shiite Muslim militants in Iraq and seeking to develop nuclear weapons. Tehran denies those claims, and blames America for Iraq’s instability.

Ms. Esfandiari was detained Dec. 30 after three masked men holding knives threatened to kill her on her way to Tehran’s airport to fly back to America. from a visit to her mother, the Wilson Center has said.

For weeks, she was interrogated by authorities for up to eight hours a day about the activities of the Center’s Middle East Program, the Washington-based foundation said.

She was charged in May, and for months, her only contact with her family were brief telephone calls to her mother in which she said she was under stress. Since her release on bail, Ms. Esfandiari is believed to have stayed at her mother’s home in Tehran.

“She called when she arrived in Vienna at the airport, and it was so good to hear her voice. She sounded very happy,” her daughter said.

A phone message left by the AP with the Wilson Center was not immediately returned Monday.

Iran has charged three other Iranian-Americans with security-related offenses: Parnaz Azima, a journalist for America-funded Radio Farda; Kian Tajbakhsh, an urban planning consultant with the Soros Foundation’s Open Society Institute; and Ali Shakeri, a founding board member of the Center for Citizen Peacebuilding at the University of California, Irvine.

Shakeri and Tajbakhsh are in prison; Mr. Azima is free but barred from leaving Iran. No other details about the circumstances of the three are known for now.

In July, Iran’s state television broadcast a video in which Ms. Esfandiari said a network of foreign activists was trying to destabilize Iran and bring about “essential” social change. Mr. Tajbakhsh, who also featured in the video, said that his organization tried to create a “gap between the government and the nation.”

The Wilson Center and the Open Society Institute criticized the Iranian government for the broadcast and dismissed the statements as “coerced.”

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Associated Press writer Anna Johnson contributed to this report from Cairo, Egypt.