A series of unprecedented US strikes  against Iran "devastated" its nuclear programme, Defense Secretary Pete
Hegseth said Sunday, as he asserted Washington was not seeking regime change in Tehran.

The Pentagon chief urged Iran's leaders to find an off-ramp to the conflict after President Donald Trump announced the strikes on a key underground uranium enrichment site at Fordo, along with nuclear facilities in Isfahan
and Natanz.

"We devastated the Iranian nuclear programme," Hegseth told a Pentagon press  briefing, adding that the operation "did not target Iranian troops or the  Iranian people".

Trump "seeks peace, and Iran should take that path", Hegseth continued. "This  mission was not, and has not, been about regime change," he added.

Trump's intervention -- despite his past pledges to avoid another "forever  war" -- threatens to dramatically widen the conflict after Israel launched an unprecedented bombing campaign against Iran last week, with Tehran vowing to retaliate if Washington joined in.

Earlier the US president said Washington would hit more targets if Tehran did not capitulate. Hours later, Iran launched two waves of attacks against its long-time foe Israel..

Iranian Foreign Minister Abbas Araghchi accused the United States of  sabotaging diplomacy after talks with European powers.

"This week, we held talks with the E3/EU when the US decided to blow up that  diplomacy," he wrote on X.

Araghchi later told reporters in Istanbul the United States and Israel had  "crossed a very big red line", asserting Iran would continue to defend itself  "by all means necessary".