(AP) – The editors of The Washington Post say reporter Jason Rezaian is in “good spirits” following his release by Iran.

In an internal memo to Post staff, Executive Editor Martin Baron and Foreign Editor Douglas Jehl said they had spoken briefly by telephone with Rezaian, who was being evaluated at a U.S. military hospital in Germany.

They said Rezaian expressed appreciation for the unwavering support from his colleagues while noting that his social isolation during captivity was particularly difficult.

According to his editors, Rezaian found escape in the fiction stories he was allowed to read. After his release, the Post reporter says he read news coverage on his mother’s iPad.

Baron and Jehl wrote that Rezaian hopes to meet with the editors in person tomorrow – and in the meantime, just looked forward to getting some sleep.

A special U.S. presidential envoy has tweeted a photo of Jason Rezaian after the American journalist landed in Geneva following his release by Iran.

Brett McGurk said Sunday that he was “thrilled” to see Rezaian land safely in Geneva and “overwhelmed” to greet The Washington Post reporter and two other Americans freed by Tehran – former U.S. Marine Amir Hekmati and pastor Saeed Abedini.

The three later left Geneva and arrived in Germany, according to a U.S. State Department official. No other details were immediately available about how long they would remain in Germany and when they might return to the U.S.

U.S. officials had said Saturday that the released prisoners would be taken to a U.S. military hospital in Landstuhl, Germany, for medical treatment. The hospital is near the U.S. military’s Ramstein Air Base.