The single sharpest fact in one or two punchy sentences.

US forces have launched a strike on Iran in response to a drone attack on a cargo ship in the Strait of Hormuz, with each country accusing the other of violating a ceasefire agreed on last week. Oil prices dropped by about 3% on Friday as a result.

The attack on the cargo ship was carried out by an Iranian drone, and the US has since called it an "unwarranted aggression" that has clearly violated the ceasefire agreement. The US military struck missile and drone storage locations and coastal radar sites on Saturday, and a US official reported that the operation had concluded.

Iran has denied any wrongdoing and accused the US of violating the ceasefire agreement. The Revolutionary Guards said that in response to the US strike, its navy had struck the locations where the terrorist US military is stationed in the region.

Tehran has said it would control the Strait of Hormuz and warned Gulf states not to side with Washington after Thursday’s attack on a cargo ship travelling near Oman’s coast. US President Donald Trump blamed the attack on Iran and said it violated last week’s agreement.

US Vice President JD Vance, once seen as a sceptic on US intervention in Iran but now a Trump administration point person on the conflict, said the Americans have honoured the ceasefire deal, also known as a memorandum of understanding.

Ebrahim Azizi, the head of the Iranian parliament’s national security committee, said in response to the US strikes that Trump had failed to show commitment to the principles of negotiation or ceasefire.

Iranian state media, citing an unnamed military source, reported the US strike at the port of Sirik after an explosion was heard there.

The Revolutionary Guards said that if the aggression is repeated, their response will be broader than this.

US Secretary of State Marco Rubio issued a joint statement with the Gulf Cooperation Council calling for “free, unconditional, and unrestricted navigation” in the strait without tolls or “attempts to assert control”.

Iran’s foreign ministry said the strait should be governed by Iran and Oman, while Ali Akbar Velayati, top adviser to Iran’s supreme leader, warned Washington’s Gulf allies their survival depended on Tehran’s tolerance.

Saudi Aramco resumed crude loadings at its Ras Tanura terminal in the Gulf, the world’s biggest oil port, after a nearly four-month halt, shipping data showed.

Fertiliser shipments through the strait have also picked up, helping to assuage concerns about a spike in global food prices.

“The unwarranted aggression against commercial shipping by Iranian forces clearly violated the ceasefire.”

Key Facts

• The US military struck missile and drone storage locations and coastal radar sites on Saturday. • Iran has accused the US of violating the ceasefire agreement. • The attack on the cargo ship was carried out by an Iranian drone. • Oil prices dropped by about 3% on Friday as a result of the conflict. • Fertiliser shipments through the strait have increased, helping to ease concerns about a spike in global food prices. • US Secretary of State Marco Rubio issued a joint statement with the Gulf Cooperation Council calling for "free, unconditional, and unrestricted navigation" in the strait.