Iran’s supreme leader Ayatollah Ali Khamenei has warned that any attack on his country would spark a regional conflict, as the US continues to build up its forces nearby.

“The Americans should know that if they start a war, this time it will be a regional war,” Khamenei was quoted as saying by the semi-official Tasnim news agency.
Donald Trump earlier said Iran was in “serious discussions” and he hoped they would lead to something “acceptable”, while Iran’s Foreign Minister Abbas Araghchi told CNN he was “confident that we can achieve a deal” on Tehran’s nuclear programme.
Trump has threatened to intervene in Iran over its nuclear ambitions and after its deadly crackdown on anti-government protests.
Araghchi said: “Unfortunately, we have lost our trust [in] the US as a negotiating partner,” but added the exchange of messages through friendly countries in the region was facilitating “fruitful” talks with Washington.
Iran’s top security official Ali Larijani had previously said a framework for negotiations was progressing.
As part of its build up of forces, the US has sent its aircraft carrier the USS Abraham Lincoln to the region and late last week US Central Command said it was operating in the Arabian Sea.
The US has warned Iran against any “unsafe and unprofessional behaviour” near its forces in the area.
Araghchi responded by saying: “The US military is now attempting to dictate how our Powerful Armed Forces should conduct target practice in their own turf.”
On Saturday, two explosions in Iran heightened anxiety in the country. Local authorities said a blast that killed one and hurt 14 at a building in the southern port city of Bandar Abbas was caused by a gas leak.
Tasnim denied social media reports that a Revolutionary Guards Corps navy commander had been targeted in the blast.
In the south-western city of Ahvaz, at least four people were killed in another explosion, with local authorities again blaming a gas leak, according to Iran’s Tehran Times.
On Thursday, Trump said he had told Iran that it had to do two things to avoid US military action: “Number one, no nuclear. And number two, stop killing protesters.”
The US-based Human Rights Activists News Agency says it has confirmed the killing of more than 6,300 people since the unrest began in late December, and is investigating another 17,000 reported deaths.
Another group, the Norway-based Iran Human Rights (IHR), has warned the final toll could exceed 25,000.
Protesters have told the BBC that the lethal crackdown by security forces was unlike anything they had witnessed before.
In his remarks on Sunday, Khamenei accused protesters of attacking police, the IRGC and other facilities including banks and mosques.
“The coup was suppressed,” Tasnim quoted him as saying.
Reposted from the BBC