"Iran is like a Greek god with two heads. One says it wants negotiations, the other is working to build a Shiite empire," Maj.-Gen. Amos Gilad, Director of Policy and Political-Military Affairs at the Defense Ministry, said, speaking on Israeli security at a conference in the city of Herzliya, as quoted in a statement on the event's website.
Under the framework deal reached in April, Tehran pledged to cut back its uranium enrichment and decrease its number of centrifuges, in exchange for a gradual lifting of international sanctions.
Israel has voiced concerns over the nuclear deal, warning it will not prevent Iran from developing nuclear weapons and claiming that the lifting of sanctions could make Iran stronger, which would destabilize the region.
Israeli Prime Minister Benjamin Netanyahu said a deal "based on this framework would threaten the survival of Israel."