Three out of four US prisoners released by Iran

US administration officials said Sunday:  “We can confirm that our detained US citizens have been released and that those who wished to depart Iran have left.” This statement was issued after only three out of four US citizens released by Iran in the prisoner swap with America were aboard the Swiss plane flying out of Tehran Sunday. The swap was announced Saturday, shortly before the nuclear watchdog’s green light for the lifting of sanctions against Iran under last year’s nuclear pact. It is not clear why the fourth American was not released.