Iran and the US traded fire on Monday, with Tehran claiming attacks on American military sites in the Gulf and Jordan after Washington launched its fifth wave of strikes in six days in response to attacks on shipping in the Strait of Hormuz.The latest retaliatory strikes have placed renewed pressure on a month-old ceasefire framework, with the arch foes accusing each other of aggression and moving farther away from the commitments that halted 39 days of all-out war.The US launched its latest wave of strikes, its fifth since last Wednesday, following Iranian attacks on commercial shipping in the strait. Iran said its retaliation targeted American military facilities in Bahrain, Jordan, Kuwait and Oman.The escalation appears to be the biggest threat to the diplomatic track launched since the June 17 signing of an interim agreement to end the conflict sparked by US-Israeli strikes against Iran on February 28. Instead, both sides have returned to military action.The US military’s Central Command said it hit dozens of Iranian targets, including air defence systems, coastal radar sites, missile and drone capabilities, and attack speedboats belonging to the Islamic Revolutionary Guard Corps (IRGC).The US strikes Iran for the fifth time in six days, drawing Tehran's reprisals against American allies in the Middle East. Photo: Centcom / AFPInfoThe operation involved fighter aircraft, naval vessels and, for the first time, one-way attack aerial and sea drones, Centcom said.“The Strait of Hormuz is a vital maritime corridor for global trade. Iran does not control it,” it said. “US forces are positioned and prepared to ensure that freedom of navigation remains available despite unwarranted Iranian aggression.”US President Donald Trump said the strikes were ordered after Iran attacked a commercial vessel despite what he described as a breakthrough in negotiations.“We had a deal with them yesterday. They were giving up everything,” Mr Trump told CNN. “Then all of a sudden, two hours after that, they hit the ship with a drone. We hit them very hard … these people, there's something wrong with them.”Tehran warned on Monday that it would not comply with the June 17 agreement as long as Washington continues to violate its commitments, with Foreign Ministry spokesman Esmaeil Baghaei saying the agreement had “entered a crisis stage”.The US strikes followed an attack Saturday on the Cyprus-flagged MV GFS Galaxy, which US and British maritime authorities said was attacked off Oman's coast. One crew member was missing after the burning container vessel was abandoned.Washington said it had carried out strikes against around 140 Iranian targets in two waves of attacks on Sunday.Conflicting claims over Gulf basesIranian state media reported US strikes on Bandar Abbas, Hajiabad and Qeshm Island, while Axios, citing a senior US official, reported that American forces targeted missile systems, air defences and IRGC speedboats around the Strait of Hormuz.The IRGC said it carried out missile and drone strikes on US military facilities in Bahrain, Jordan, Kuwait and Oman, saying it was acting against what it called unlawful US military activity around the waterway.It said Sheikh Isa Air Base in Bahrain, Prince Hassan Air Base in Jordan and Ali Al Salem Air Base in Kuwait were struck. The IRGC claimed fuel depots, ammunition stores, Patriot air defence systems and military facilities were destroyed.The claims could not be independently verified, and neither Washington nor the governments of Bahrain, Jordan or Kuwait immediately confirmed damage to the bases.Bahrain’s Interior Ministry said warning sirens sounded across the kingdom and urged the public to seek shelter. Jordan’s military said it intercepted four missiles that entered its airspace from Iran, with shrapnel falling in several areas.In Kuwait, the armed forces said air defences were engaging “hostile aerial targets” on Monday. It said explosions that could be heard were caused by interceptions.On Sunday, Kuwait said a drone strike had hit an offshore oil platform, causing damage and injuring a worker, while three military sites near the Iraqi border were also damaged.Iran also carried out attacks targeting Jordan, Oman and Qatar, while the UAE said missile and drone threats were intercepted before entering its airspace.Strait tensions escalateThe latest flare-up followed the IRGC’s declaration that the Strait of Hormuz was closed and its attacks on commercial shipping, with Tehran saying vessels had ignored its warnings.Washington has rejected that claim.“Iran made a poor choice,” US Defence Secretary Pete Hegseth said in a post on X. “Now they pay.”Despite Tehran’s declaration, the US military and the UK-led Joint Maritime Information Centre said commercial traffic continued to move through the strait using an expanded southern route, although the maritime threat level remained “severe”.Traffic has nevertheless fallen sharply. Shipping data showed only a handful of vessels transiting the waterway at the weekend, compared with about 110 a day before the conflict, while nearly half of recent crossings were made with ships’ tracking systems switched off.Play01:58Manus on Markets: Oil and stocks agitated by latest US-Iran strikesThe disruption has rippled through financial markets. Oil prices jumped by about 4 per cent and Asian share markets slipped as investors priced in growing risks to a route through which about a fifth of global oil and LNG supplies normally pass.Although Oman has continued diplomatic contacts with Tehran in an effort to contain the crisis, the latest exchange suggests the confrontation has entered a more dangerous phase.Iran has expanded attacks against regional states hosting US forces, while Washington has broadened its campaign against Iranian military infrastructure around the Strait of Hormuz. The June 17 framework now faces its most serious challenge since it was reached.