On Sunday, after a delay, Washington Post reporter Jason Rezaian and two other Americans, released by Iran as part of a prisoner exchange deal, left Tehran on an airplane, the Post reports. The fourth American prisoner, whose detention seems not to have been reported before yesterday, did not join them.

In addition to Washington Post reporter Jason Rezaian, former U.S. Marine Amir Hekmati, and pastor Saeed Abedini, Iran also announced the release today of Nosratollah Khosravi-Roodsari. Bafflingly, Khosravi-Roodsari’s imprisonment seems not to have been previously reported.