Iran’s top diplomat insisted Wednesday that Tehran will never stop enriching uranium, further underlining the Islamic Republic's red line in negotiations with the United States over its rapidly advancing nuclear program.

By Parisa Hafezi and John Irish DUBAI/PARIS (Reuters) -While rising U.S.-Iran tensions over Tehran's uranium enrichment jeopardize nuclear talks, three Iranian sources said on Tuesday that the clerical leadership lacks a clear fallback plan if efforts to resolve a decades-long dispute collapse.

Speaking to the media in Israel for the first time in five months, the Israeli prime minister denied reports of friction with the U.S.

New report reveals Israel may be preparing a strike on Iran's nuclear facilities following U.S. intelligence showing increased military activity.

The killing of the embassy’s head of security strained an already tense relationship between the neighboring countries.

Iran’s supreme leader has pushed back against U.S. criticism of the country’s nuclear program. Ayatollah Ali Khamenei said Tuesday that Tehran won’t seek permission from anyone to enrich uranium and called American statements “nonsense.

Iran's Supreme Leader Ayatollah Ali Khamenei slamm ed U.S. demands that Tehran end its uranium enrichment program, stating that he does not believe ongoing nuclear negotiations with the U.S. will yield results. Iran says its nuclear program is for civilian purposes and that its enrichment program is a source of national pride and not negotiable.

A hijack signal sent from a Panama-flagged petroleum products tanker off Iran was a false alarm, British maritime security firm Ambrey said on Wednesday.