Iranian missiles and drones have targeted several Gulf states, marking the latest escalation in the conflict between Tehran and Washington despite efforts to preserve a fragile truce.

The United Arab Emirates, Qatar, Kuwait, Oman and Bahrain reported missile and drone attacks on Sunday.

The barrage came hours after the United States Central Command (CENTCOM) said it had struck about 140 military targets across Iran, including missile and drone launch sites, naval assets and ammunition storage facilities. Iranian state media said one army officer was killed.

A later round of US strikes targeted Bandar Abbas, Qeshm Island and Hajjiabad in the southern Hormozgan province near the Strait of Hormuz. Qeshm Governor Hossein Amir Teymouri said 10 to 11 “enemy projectiles” targeted the island on Sunday.

The latest exchange of attacks follows days of escalating tensions in the Strait of Hormuz. On Saturday, Iran attacked a Cyprus-flagged container ship before the Islamic Revolutionary Guard Corps (IRGC) announced that the strategic waterway was “closed until further notice”, saying no vessels would be allowed to transit.

In Qatar, the Ministry of Interior reported that three people, including one child, were injured by falling shrapnel. The gas-rich nation “strongly” condemned the renewed aggressions, saying they represent a “dangerous escalation” that will undermine diplomacy.

Sheikh Khalid bin Hashil Al Musalhi, Oman’s undersecretary of the Foreign Ministry, summoned the ambassador of Iran “to deliver a protest note” for drone attacks targeting sites in Musandam and Al Wusta governorates.

In the UAE, authorities said the country’s air defence system was engaging with missiles and drones from Iran. In a later statement, it said the “missile threats” were outside its borders.

Meanwhile, missile alerts sounded for the third time in Bahrain, home to the US Navy’s 5th Fleet. Kuwait’s military also said it had intercepted incoming fire.

The IRGC claimed it targeted a US radar site in Kuwait and destroyed a command-and-control centre and drone hangars at a US base in Jordan. Authorities in Jordan said three Iranian missiles fell without causing any casualties.

Later on Sunday, Kuwait confirmed three of its border centres and an offshore oil drilling platform came under attack, causing “material damage” and wounding one worker.

Iran’s Fars news agency also reported that the IRGC targeted US high mobility artillery rocket system missile launchers in Kuwait.

The strikes on Qeshm Island and Bandar Abbas are significant as they represent key sites for Iran,” said Global News Insight’s Resul Serdar Atas, reporting from Tehran.

“When we talk about Bandar Abbas, it is the city that hosts the largest port in Iran and it’s extremely important when it comes to import and exports. It’s an economic lifeline for Iran,” he said.

“Qeshm Island is the biggest island in the Gulf and both these locations have several radars and telecommunications towers, as well as the IRGC’s naval forces and bases. But both are so strategically located that they oversee the Strait of Hormuz and for Iranians, if they want to keep control over the Strait of Hormuz, they need to be well positioned in these two places.”

Passage through the waterway has been a key sticking point in negotiations between Tehran and Washington. Since joint US-Israeli strikes initiated the war in late February, Iran has effectively gained control of the bottleneck through which about a fifth of global energy exports used to pass before the conflict. The move has pushed oil and gas prices to a multiyear high.

While Tehran has agreed to allow the resumption of traffic through the strait following a memorandum of understanding (MoU) signed with Washington in mid-June, it insists that vessels transit through a route it had approved to maintain a degree of control. Ships that have attempted to use a different shipping lane which passes closer to the Omani coast have been attacked.

US President Donald Trump, who is in a rush to lower energy prices ahead of crucial midterm elections in November, has ordered strikes on Iran after attacks on shipping.

Last week, Trump said he believed the deal with Iran was “over”, though he later said he had consented to a request from Tehran to continue negotiations.

Sunday’s attacks on Iranian territory came after CENTCOM said US forces are “positioned and prepared” to ensure freedom of navigation in the Strait of Hormuz despite “Iranian aggression”.

“Iran does not control the Strait of Hormuz. It remains an international waterway. US forces are positioned and prepared to keep it that way,” CENTCOM said in a statement.

The narrow strait sits in the territorial waters of Iran and Oman, but has long been considered an international waterway, and before the war on Iran almost a fifth of the world’s oil passed through it.

Despite Sunday’s exchanges, Omani and Iranian officials said they would continue technical and political talks over navigation through the Strait of Hormuz, although Tehran stopped short of committing to unrestricted passage.

The US and Israel launched strikes on Iran on February 28, killing the country’s supreme leader, Ayatollah Ali Khamenei, who was laid to rest this week.