Israel will cease to exist within three decades, Iranian supreme leader Ayatollah Ali Kahmenei wrote on his official Twitter handle on Wednesday.Iran's supreme leader said Tehran will not negotiate with the United States on any issue after the landmark nuclear deal with world powers in July, according to his official website on Wednesday."We negotiated with the US on the nuclear issue for specific reasons. (The Americans) behaved well in the talks, but we didn't and we won't allow negotiation with the Americans on other issues," Ayatollah Khamenei was quoted as saying. The remarks by Khamenei are a continuation of the regime's belligerent rhetoric in the weeks that followed the consummation of the Joint Comprehensive Plan of Action."After negotiations, in the Zionist regime they said they had no more concern about Iran for the next 25 years," Khamenei tweeted."Firstly, you will not see the next 25 years," he tweeted, addressing Israel. "God willing, there will be nothing of the Zionist regime by the next 25 years.""Secondly, until then, struggling, heroic, and jihadi morale will leave no moment of serenity for Zionists," Khamenei tweeted.