US President Donald Trump said the war with Iran was close to over, telling the world to brace for an "amazing two days", as the army chief of mediator Pakistan arrived in Tehran in a bid to prevent a renewed conflict.

The diplomatic push came as US and Iranian officials weighed a return to Pakistan for further talks after negotiations there ended on Sunday without a breakthrough.

Pakistan's military confirmed Field Marshal Asim Munir had arrived in Tehran.

A senior Iranian source told Reuters that Munir, who had mediated the last round of talks, was heading to Iran "to narrow gaps" between the two sides.

"I think you're going to be watching an amazing two days ahead," Trump told ABC News reporter Jonathan Karl, according to a post by the reporter on X, adding he did not think it would be necessary to extend a two-week ceasefire that expires next week.

"I think it's close to over, yeah.

I mean I view it as very close to over," Trump said in an interview on Fox Business Network conducted Tuesday and broadcast Wednesday.

"We'll see what happens.

I think they want to make a deal very badly." Officials from Pakistan, Iran and Gulf states also said both sides could return to Islamabad in coming days.

The talks last weekend broke down without an agreement to end the war, which Trump launched alongside Israel on February 28, triggering Iranian attacks on Iran's Gulf neighbours and reigniting a conflict between Israel and Iran-backed Hezbollah in Lebanon.Trump's optimism lifted global stocks towards record highs.

Oil prices - having fallen on Tuesday and in early Wednesday trade - were slightly up at around $95 per barrel, after the US said its blockade of Iranian ports had halted seaborne trade in and out of Iran.TANKERS INTERCEPTEDThe U.S.

military said it was turning back more vessels, including the U.S.-sanctioned, Chinese-owned tanker Rich Starry which was seen heading back through the Strait of Hormuz on Wednesday.

destroyer stopped two oil tankers attempting to leave the Iranian port of Chabahar on the Gulf of Oman on Tuesday, a U.S.

official said.

An Iranian supertanker subject to U.S.

sanctions crossed the strait towards Iran's Imam Khomeini port despite the blockade, Iran's Fars News agency said on Wednesday.

Fars did not identify the tanker or give further details of its voyage.

While Iran and the United States appear so far to have avoided a major confrontation at sea since the United States began....