Ahmad Vahidi, deputy IRGC commander and the man Argentina formally accused of planning the 1994 Buenos Aires bombing that killed 85 people, has emerged as the key figure in organising Tehran's military response and partaking in back-channel negotiations with regional mediators.

A hard-line Iranian general linked to notorious attacks at home and abroad is believed to have seized a place near the center of power as negotiations with the United States hang…

Hidden supreme leader, hard-line commanders complicate path to any US-Iran deal