CBS:

The Trump administration is increasingly concerned about the deteriorating health of Baquer Namazi, an 80-year-old U.S. citizen currently detained in Iran, and it strongly refuted Iranian claims that he was merely under house arrest.

"This is patently false and indicates that the Iranian foreign minister is either attempting to deceive or is so far out of touch with his own government's detention operations that he is ignorant of the Namazis' actual situation," the White House official said in a statement to CBS News.

White House officials told CBS News that both Baquer and his son 46-year-old son Siamak remain at Evin Prison and face health problems. The two Iranian-Americans have been imprisoned for nearly two years on espionage-related charges.

"We believe the Namazis have received especially severe treatment in Evin Prison, probably due to their American citizenship," the official said. 

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