Trump: if Tehran attacks, it will be 'official end of Iran'

US President Donald Trump issued a stern warning to Iran on Sunday, suggesting that if the Islamic republic attacks American interests, it will be destroyed.

"If Iran wants to fight, that will be the official end of Iran. Never threaten the United States again," Trump said in a tweet.

Tensions between Washington and Tehran have been on the rise as the United States has deployed a carrier group and B-52 bombers to the Gulf over what it termed Iranian "threats."

Iran's foreign minister downplayed the prospect of a new war in the region on Saturday, saying Tehran opposed it and no party was under the "illusion" the Islamic republic could be confronted.

"We are certain... there will not be a war since neither we want a war nor does anyone have the illusion they can confront Iran in the region," Mohammad Javad Zarif told state-run news agency IRNA at the end of a visit to China.

Iran-US relations hit a new low last year as US Trump pulled out of a 2015 nuclear deal and reimposed unilateral sanctions that had been lifted in exchange for Tehran scaling back its nuclear program.