Baquer Namazi, left, and Siamak Namazi have been unable to leave Iran since 2016. Siamak remains in Tehran's Evin jail. Family handout
Baquer Namazi, left, and Siamak Namazi have been unable to leave Iran since 2016. Siamak remains in Tehran's Evin jail. Family handout

Ex-Unicef official has surgery in Iran after plea to leave fails