BBC: An Iranian-American academic jailed during a visit to Tehran in May has been freed, the official state news agency Isna has reported.
Detained on security-related charges, Haleh Esfandiari, 67, was released for a bail of 3 billion rial ($320,000; £160,000), according to Isna.
Ms Esfandiari, who works for a research institute in Washington, was jailed while visiting her 93-year-old mother.
Her release comes amid ongoing tensions between the US and Iran.
US National Security Council spokesman Gordon Johndroe told AFP news agency: "This is encouraging news and the United States welcomes this." Iran frees detained US academic (more)
Mark Alexander
