The Wall Street Journal was the first to report on the news, describing the release as part of a U.S.-backed trade that returned more than 200 Houthi loyalists to the war-ravaged nation.
The State Department did not comment on a possible trade, and NBC News has not independently confirmed that the Americans' release was part of such a deal.
Oman’s state news agency reported that following royal directives, the American citizens were flown out of the Yemeni capital Sanaa to the Omani capital of Muscat on board two Royal Air Force of Oman flights.
A news agency affiliated with the Houthi rebels, who have been fighting a Saudi-led coalition allied with the internationally recognized government since 2015, said Thursday that 283 wounded Houthis had returned to Yemen from Oman.
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Abigail Williams is a producer and reporter for NBC News covering the State Department
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