The negotiations - which ended in Geneva on an upbeat note this week with Western and Iranian negotiators announcing a follow-up round early next month -- are meant to reduce fears that Tehran is seeking a nuclear weapon.
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Foreign Minister Mohammed Javad Zarif posted on his Facebook page on Friday that "there is a high possibility the talks would be disturbed through various efforts" on the part of Israel.
Zarif says this reflect Israel's "frustration and warmongering."
Israel has urged the international community to maintain firm pressure on Tehran.
The West suspects Iran's nuclear program could eventually be used to produce atomic weapons. Iran insists it is only for peaceful purposes.
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