TEHRAN - Iran said it had yet to decide whether to attend a new round of peace negotiations with the United States on Monday, casting uncertainty on a push to stop the Middle East war from resuming.

US president Donald Trump said he was sending negotiators to Pakistan for talks on ending the war that engulfed the region and rattled global markets, while repeating threats to attack Iran's infrastructure if it did not make a deal. After initial talks in Islamabad ended without a deal earlier this month, both sides have accused the other of breaching a temporary truce that is now in its final days. "We have no plans for the next round of negotiation, and no decision has been made in this regard", Iranian foreign ministry spokesman Esmaeil Baqaei said Monday. "The US are carrying out behaviours that do not in any way indicate seriousness in pursuing a diplomatic process", he added, calling an ongoing US blockade of Iranian ports and its recent seizure of a ship "clear violations of the ceasefire". Trump has similarly accused Tehran of violating the truce -- set to lapse overnight Tuesday -- by firing on ships in the crucial Strait of Hormuz trade route, which Iran has all but shut. The accusations have thrown into fresh doubt the bid to end the war that began with US-Israeli strikes on Iran the morning of February 28, killing the country's supreme leader Ali Khamenei. Oil prices jumped sharply on Monday over fears hostilities could resume in the weeks-long war, after Iran closed the Strait of Hormuz again following a brief reopening over the weekend. (Bssnews)