(Tehran, Iran) — A California student being detained in Iran has once again been banned from leaving the country. Esha Momeni was detained in October during a visit to the Islamic Republic to see family and carry out research on the women's movement. The California State University Northridge student was freed on November 10th after almost four weeks in a Tehran prison. Judiciary spokesman Alireza Jamshidi said Momeni has again been banned from leaving because of a new, unspecified charge against her that is being investigated. He did not give any more details, other than to say he thought the latest ban would last for about a month or so before it is withdrawn. The Iranian judiciary previously accused Momeni of acting against national security and of making propaganda against Iran's system of government.