08:44 AM EDT, 04/28/2026 (MT Newswires) -- Oil prices were sharply higher early on Tuesday, with the U.S. benchmark price rising back above US$100 per barrel for the first time in three weeks as hopes for an end to the war on Iran fade and the Strait of Hormuz remains closed.

West Texas Intermediate crude oil for June delivery was last seen up US$4.94 to US$101.31 per barrel, the highest since April 7, while June Brent oil was up US$3.66 to US$111.89.

Weekend talks expected to be held in Pakistan between Iran and the United States failed to take place, while a Monday proposal from Iran to reopen the Strait of Hormuz in return for lifting a U.S. blockade of its ports and deferring talks over its nuclear program was rejected by President Trump.

Iran closed the Strait of Hormuz after the United States and Israel launched attacks on the country on Feb. 28. The Strait is the chokepoint for 20% of daily global oil demand supplied by Persian Gulf nations and its closure has produced the largest-ever supply shock, pushing up oil prices by 44% since the start of the war.

"Oil extended its rally ... amid no signs of progress toward reopening the Strait of Hormuz, where US and Iranian blockades have reduced daily transits to near zero. Warnings over the severity of the global supply squeeze continue to intensify, with tightness in refined fuel markets already pushing diesel and jet fuel prices toward USD 200 per barrel," Saxo Bank noted.

The closure of the Strait has pushed up spot price for oil, as the Asian nations that rely on Gulf producers compete for available barrels. Rising prices have heightened inflation and raises the risk of a global recession as the lack of supply forces demand destruction and chokes off economic growth.

"Alarm bells will ring loudly if the SoH (Strait of Hormuz) doesn't reopen during May. Spot crude and product prices will trade higher and higher. And if a decent reopening doesn't take place before June/July, then the risk is significant for a real crisis where the world may be forced to reduce its oil consumption closer to the level of availability," Bjarne Schieldrop, Chief analyst commodities at SEB Research, wrote.