The four are Babek Saran, Mehdi Samdi, Homan Armand and Wahid Barki. Wahid Barki was released on bail after one week, but the three others are still being held in temporary detention in Wing 209 of Evin Prison. Babek Saran is the son of Amir Hussein Hashmal Saran, who died three years ago in Rajaï Shahr Prison.
Source: Iran Daily Brief