According to CNN, on June 27 local time, Iran said that in response to the U.S. strikes near the Strait of Hormuz, Iran had attacked U.S. military targets in the Middle East. This is the first military confrontation between the two countries since they signed a memorandum of understanding last week.
On that day, the Islamic Revolutionary Guard of Iran announced an attack on a military base of the US military. The Iranian Ministry of Foreign Affairs also accused the US side of violating agreements reached between the two countries. The US military has not yet confirmed the news of the attack.
Before launching this round of retaliation, Iran conducted an air strike on Iranian military targets around the Strait of Hormuz on the 26th local time. The U.S. Central Command stated: "U.S. warplanes targeted Iranian missile and drone storage facilities, as well as coastal radar stations. Iran's armed forces carried out an unprovoked attack on civilian shipping, clearly violating the ceasefire agreement."

On June 26 local time, the US military released a video claiming that they carried out an air strike against Iran that day. The Central Command of the US military.
The US military stated that Iran attacked a merchant ship crossing the Strait of Hormuz on the local time of the 25th. Hours before the US military launched its attack, U.S President Donald Trump posted a message on the 'RealSocial' platform, stating that Iran's actions were a 'foolish violation' of the US-Iran ceasefire agreement.
In addition, Bahrain, which has US military bases on its territory, reported on the 27th that an Iranian drone attacked its territory early that morning. The Ministry of Foreign Affairs of Bahrain condemned the attack as an "open violation of Bahrain's sovereignty." The specific target of the attack remains unclear, and Tehran has not responded to this matter yet.
Meanwhile, the UK Maritime Trade Operations Office (UKMTO) reported that on the 27th, an oil tanker was hit by 'unknown projectiles' in the Hormuz Strait. The agency stated that the ship was damaged, but no crew members were injured. It also advised ships passing through to be cautious in this area.
According to reports, as the US-Iran Memorandum of Understanding was signed, a series of attacks disrupted the navigation order in the Strait of Hormuz once again.
The memorandum stipulates that Iran must make every effort to take appropriate measures to ensure the safe passage of civilian vessels through the Strait of Hormuz and restore shipping traffic to pre-war levels. However, it does not specify detailed rules for implementing these measures. There are completely contradictory interpretations regarding whether Iran should charge transit ships for passage. Trump insists that the Strait should remain free of charge, while Iran argues that it has the right to impose a fee on passing ships.