AP:

Iran has released Iranian-American peace activist Ali Shakeri after he spent four months in a Tehran prison on charges he was trying to stir up a revolution, a judiciary spokesman said Tuesday. Shakeri is the fourth Iranian-American released by Iran since August after being accused of endangering national security – claims they, their families and their employers deny. The charges have increased tensions between the United States and Iran, already high over U.S. accusations that Iran is seeking to develop a nuclear weapons and is fueling violence in Iraq. Iran denies both claims.