Iran and the Washington Post are reporting that four people with dual U.S. and Iranian citizenship are being released in a prisoner swap.

The announcement on Iranian state television came as Iran and world powers prepare to implement last July's nuclear deal lifting international sanctions on Tehran.

Washington Post bureau chief Jason Rezaian, Amir Hekmat, pastor Saeed Abedini and and a fourth Iranian-American national who were jailed in Iran on various charges in recent years have all reportedly been released as part of the deal in exchange for six Iranians being held in the United States.