Consumer prices in the United States have risen by nearly 1 percent in March – one of the highest short-term inflation rates in years – largely due to the disruption of the energy markets amid the war on Iran.

A report by the US Bureau of Labor Statistics, released on Friday, showed that inflation in March rose by 0.9 percent, compared with 0.3 percent in February. It was the largest uptick since May 2022, which took place at the height of the cost-of-living crisis prompted by the COVID-19 pandemic.

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The March increase was driven by energy prices, with gasoline going up by 21.2 percent and fuel oil increasing by more than 30 percent.

“The index for energy increased 10.9 percent in March, the largest monthly increase in the index since September 2005,” the government report said.

After the US and Israel launched an all-out war on Iran on February 28, killing the country’s Supreme Leader Ali Khamenei, Tehran closed the Strait of Hormuz, sending oil and gas prices across the world soaring.

The price for a barrel of oil reached $120 during the war, up from about $70 on February 27.

In the US, the price of one gallon (3.8 litres) exceeded $4.1. It was less than $3 before the fighting began.

Late on Tuesday, the US and Iran agreed to a two-week ceasefire that would see Iran lift its blockade on Hormuz.

But marine traffic in the strategic waterway that connects the Gulf to the Indian Ocean remains at a fraction of its pre-war levels.

On Wednesday, Iran’s Fars News Agency said “oil tankers have been suspended from passing through the Strait of Hormuz” in response to the Israeli assault on Lebanon, which killed more than 300 people.

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US President Donald Trump has warned Iran against blocking the strait or charging vessels for safe passage.

About 20 percent of the world’s oil passed through the Strait of Hormuz before the war.

While the ceasefire has brought relative relief to the global energy market, bringing down the price of oil to less than $100, US consumers are still paying $4.15 on average at the petrol pump, according to the American Automobile Association (AAA). Experts say it will be many months before prices stabilise.

Friday’s inflation report came as many politicians in the US are focusing on the cost of living and affordability, before the November midterm elections that will determine control of Congress for the rest of Trump’s presidency.

Trump’s Democratic rivals have been rebuking him for launching the war without congressional approval, highlighting increased economic costs for Americans.

But the White House has argued that the uptick in petrol prices represents “short-term pain” that will be offset by the supposed benefits of defeating Iran.

A US delegation, led by Vice President JD Vance, is en route to Pakistan to meet with Iranian officials for talks to finalise a long-term ceasefire deal.