A wave of US strikes represents the gravest test yet of the fragile truce. Here’s what happened, what officials are saying and whether the deal can survive

• Middle East crisis – live updates

The US launched strikes across southern Iran for a second consecutive day on Thursday. Although there have been several breaches of the ceasefire agreed between the two sides in April, the attacks this week – launched after the downing of a US helicopter over the strait of Hormuz – represent the most serious and extensive breakdown of the truce to date.

The US president, Donald Trump, raised the prospect of further attacks, while his defence secretary, Pete Hegseth, told reporters that if strikes “have to happen … they will be strong and they will be clear”.

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Three Indian seafarers were killed in a US attack on an oil tanker earlier this week, India’s shipping minister, ‌Sarbananda Sonowal, said.

“It is deeply unfortunate to learn of the tragic incident aboard the Palau-flagged MT Settebello. Sadly, three Indian seafarers initially reported missing are now confirmed dead after bodies have been located and identified,” he wrote in a post on X.

The Middle East is being pulled deeper into crisis & the consequences reach far beyond the region.”