Iranian state television has broadcast purported confessions by more than a dozen suspects in connection with the killing of five nuclear scientists since 2010.
The August 5 broadcast showed some of the suspects reenacting the assassinations in different districts of Tehran.
The TV showed a military garrison it said was a training camp outside Tel Aviv in Israel.
It said the suspects took courses there, including how to place magnetic bombs on cars -- the method used in the killing of the scientists.
Iran has blamed Israeli, U.S., and the British secret services for the assassinations, with support from some of Iran's neighbors.
The U.S. and Britain have denied involvement. Israel has not commented.
With reporting by AFP and AP