Iran and the United States reached a deal under which Iran will free five U.S. citizens detained in Iran and the United States will unblock $6 billion in Iranian funds held in South Korean banks. Iran took the first step in implementing the deal by releasing four of the detained individuals from Evin prison. The unfrozen funds will be transferred to an account in Qatar and may only be spent on non-sanctioned humanitarian trade. According to the Iranian mission to the United Nations, the deal also stipulates that United States will release some Iranians currently in U.S. prisons.