Armed maritime vessels of the Islamic Revolutionary Guard Corps (IRGC) have opened fire on a tanker in the Strait of Hormuz, according to the United Kingdom Maritime Trade Operations (UKMTO) center, as reported by the BBC. The crew is reported to be safe. A container ship was also struck by "an unknown projectile" about 25 miles northeast of Oman, causing damage to several containers. Iran's Supreme National Security Council (SNSC) declared it is "determined" to exercise control over the strait until the end of the war. This response comes after the IRGC announced that the strait would return to its "previous state," with armed forces controlling the area. U.S. President Donald Trump stated that the United States would not allow Iran to "blackmail" Washington. Meanwhile, the U.S. has announced that it has turned back 23 ships since the start of the naval blockade on April 13, while Iran's SNSC described this action as a violation of the ceasefire terms. A French soldier from the UN peacekeeping mission has been killed, according to President Emmanuel Macron, who suggested that Hezbollah might be responsible. The latter has denied involvement in the incident. The Israel Defense Forces (IDF) announced that they have established a security perimeter called the "yellow line" in southern Lebanon and have struck "terrorists who violated the ceasefire" as they approached Israeli forces. Field reports indicate that residents in the border town of Khiam are trying to return to their homes, while the Lebanese army has set up barriers to prevent them, at a time when loud explosions continue to be heard in areas under Israeli control. The explosions are suspected to be related to Israeli military operations to destroy structures. The United Nations Interim Force in Lebanon (UNIFIL) stated that a preliminary assessment indicated the fire was caused by non-state actors, "suspected to be Hezbollah," and an investigation has been launched into the matter. Hezbollah has responded by denying involvement and expressing "surprise" at the swift accusations, emphasizing the need for coordination between the Lebanese army and UNIFIL, especially under these delicate conditions. UKMTO reported that a tourist vessel has reported a "near-miss strike" about three nautical miles east of Oman, following reported attacks on a tanker and a container ship in recent hours.