U.S. officials wouldn't let Iranians take control of the money until a Swiss Air Force plane carrying three freed Americans departed from Tehran on Jan. 17, the officials said.
Once that happened, an Iranian cargo plane was allowed to bring the cash back from a Geneva airport that day, according to the accounts.
President Barack Obama and other U.S. officials have said the payment didn’t amount to ransom, because the money was owed by the U.S. to Iran as part of a longstanding dispute linked to a failed arms deal from the 1970s. U.S. officials have said that the prisoner release and cash transfer took place through two separate diplomatic channels.
But the handling of the payment and its connection to the release of the Americans have raised questions among lawmakers and administration critics.
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One of the Americans released in January as part of the prisoner exchange, a Catholic pastor named Saeed Abedini, said he and other American prisoners were kept waiting at Mehrabad airport for more than 20 hours from Jan. 16 to the morning of Jan. 17.
He said in an interview that he was told by a senior Iranian intelligence official at the time that their departure was contingent upon the movements of a second airplane.
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