AEI's IranTracker posts a call for a general strike in Iran on Tuesday for "all workers and government and non-government workers, except workers of hospitals, health centers and fire-fighting agencies." The letter is posted with the disclaimer that the site's editors can't vouch for its authenticity (and that the source wishes to remain anonymous), but the call purports to come from the News Agency of Students Supporting the Civil Movement in Iran and says that "students and university workers are also requested to cooperate with us by dismissing universities on this day." Read the full text of the letter here.