The renewed violence threatens to derail negotiations aimed at reaching a permanent US-Iran agreement on Tehran’s nuclear programme, sanctions relief and regional security. It also raises fresh concerns over shipping through the Strait of Hormuz, through which nearly one-fifth of the world’s seaborne oil passes. For India, one of the world’s largest crude importers, any prolonged disruption in the waterway could affect oil supplies, freight costs and domestic fuel prices.

Iran widens retaliation

Iran’s paramilitary Islamic Revolutionary Guard Corps (IRGC) said it had targeted several locations linked to what it called the “US terrorist army” in the region, though it did not specify the locations.

Separately, Bahrain’s foreign ministry said a “number of Iranian drones” had targeted the kingdom, calling the attack “a flagrant threat to the security of citizens and residents”. Bahrain has been among the Gulf countries most critical of Iran and hosts the US Navy’s Fifth Fleet.

Meanwhile, the United Kingdom Maritime Trade Operations (UKMTO), operated by the British military, reported that a tanker had been attacked in the Strait of Hormuz. It said the crew was safe and there was no environmental damage. No one immediately claimed responsibility, but the attack came just two days after Iran targeted a cargo vessel off the coast of Oman.

US says Iran violated ceasefire

The United States launched strikes late Friday after accusing Iran of carrying out a drone attack on a commercial vessel attempting to leave the Strait of Hormuz a day earlier.

US President Donald Trump said Tehran had violated the ceasefire. “I don’t like the fact that they took a shot yesterday, actually four of them,” Trump told reporters shortly before the operation.

US Central Command later said American forces struck Iranian missile launch sites, drone facilities and coastal radar installations. A US official told the Associated Press the operation lasted about an hour.

Vice President JD Vance later urged Tehran to return to diplomacy, saying Iran should “pick up the phone” if disagreements over the ceasefire emerged, while warning that “violence will be met with violence.”

Strait of Hormuz back under threat

The latest attacks have again put the Strait of Hormuz at the centre of the conflict after last week’s agreement had reopened the critical shipping lane.

The International Maritime Organization had begun moving stranded vessels out of the Gulf through an alternative route near Oman’s coastline after the interim US-Iran agreement. However, those efforts were suspended after Thursday’s attack on a commercial ship.

Shipping analysts say confidence in the route has weakened again even though commercial traffic continues. Any sustained disruption could have global consequences because around 20% of the world’s seaborne crude oil passes through the strait.

Lebanon ceasefire remains fragile

The escalation also comes as diplomatic efforts continue in Lebanon, where Israel and Hezbollah have agreed to a fragile ceasefire framework after months of fighting.

Israeli Prime Minister Benjamin Netanyahu has said Israeli forces will remain in a security zone in southern Lebanon until Hezbollah no longer poses a threat. Lebanon has described the framework as an important step towards restoring stability, though sporadic violence continues.

What happens next?

Saturday’s attacks represent the biggest challenge yet to the fragile US-Iran ceasefire and the 60-day roadmap agreed by both countries. Negotiators are still expected to pursue talks on Iran’s nuclear programme and sanctions relief, but the latest military exchanges, coupled with renewed attacks in the Strait of Hormuz, have significantly raised the risk that the interim agreement could unravel before a final deal is reached.

(With inputs from Reuters and AP)