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Iran says Strait of Hormuz will be closed over Israel attacks on Lebanon

Published June 21, 2026 · Updated June 21, 2026 · By Mary Anderson

Iran Says Strait of Hormuz Will Be Closed Over Israel Attacks on Lebanon

Iran says Strait of Hormuz will - Iran's military has once again shut down the Strait of Hormuz, citing Israeli airstrikes in southern Lebanon as the reason. This strategic waterway, which serves as a critical route for global energy shipments, is now under threat from Tehran's assertion that continued Israeli aggression violates the terms of a recent agreement with the United States. The move underscores the escalating tensions between Iran and Israel, which have reignited concerns over the stability of the region.

Breaking the Agreement

The Iranian Revolutionary Guard Corps Navy issued a warning to international vessels, stating, "Do not approach the Strait of Hormuz; otherwise, your security will be jeopardized." This directive comes amid accusations that Israel has breached the US-Iran deal by failing to halt military operations in Lebanon. The 14-point memorandum of understanding, signed days prior, mandates the "immediate and permanent termination of military operations on all fronts, including in Lebanon." Iran's top military command described the closure as a necessary first step in response to Israel's "continuous and relentless violation of the ceasefire" in southern Lebanon.

Iran claims that the US has not fully honored its commitments under the agreement, allowing Israel to continue targeting Hezbollah positions. The Iranian leadership emphasized that this action is a direct consequence of the enemy's failure to abide by the terms of the deal. "It is noted that this first step is a response to the enemy's breach of promise, and if the aggression continues, further steps will be planned and taken to force the enemy to comply with its obligations," the statement read.

US Response and Maritime Traffic

Despite Iran's announcement, the US Central Command (Centcom) reiterated that safe passage through the strait "remained intact," and commercial ship traffic had increased on Saturday, with 55 merchant vessels transiting the area. However, the timing of Centcom's statement raised questions about whether it referred to the situation before or after Iran's closure. The confusion highlights the urgency of the moment, as the strait's disruption could have significant economic repercussions.

Historically, the Strait of Hormuz has been a linchpin for global energy security, facilitating the movement of about 20% of the world's oil and liquefied natural gas. Its strategic importance is underscored by its depth, which accommodates the largest crude oil tankers, and its role in connecting major Middle Eastern producers to international markets. In 2025, an estimated 20 million barrels of oil and related products pass through the strait daily, contributing nearly $600 billion to global energy trade annually.

Lebanon's Casualties and Ceasefire Disputes

Less than 24 hours after a new ceasefire between Israel and Hezbollah was announced, reports indicated that about two dozen individuals had been killed in Israeli airstrikes targeting southern Lebanon. Hezbollah accused Israel of repeatedly violating the ceasefire, arguing that its attacks are justified as a defense of Lebanon's sovereignty. "The group has the right to defend their land and sovereignty in the face of ongoing Israeli aggression," a Hezbollah spokesperson stated.

Israeli officials, however, maintained that the conflict with Hezbollah is distinct from the broader war with Iran. They confirmed that the ceasefire between Israel and Hezbollah took effect at 16:00 local time on Friday, yet a military spokesman clarified that operations would continue to address "immediate threats" posed by Hezbollah. This stance led to the recent fatalities, including a family of four in the town of Barich, according to state media reports. The Israeli military claimed it had struck "dozens" of Hezbollah targets following the group's assault with over 50 projectiles on Israeli forces in the region.

Geopolitical Context and Future Talks

Minutes before Iran's closure announcement, US Vice-President JD Vance expressed plans to visit Switzerland for negotiations with Iranian officials. The talks aim to solidify the terms of the initial agreement, which was signed days earlier by US and Iranian presidents. The agreement includes a commitment to further discussions within 60 days to reach a final resolution. However, Israel's continued presence in Lebanon has drawn criticism from the US, which fears that the ongoing conflict could destabilize the peace deal.

Iran's decision to close the strait echoes its earlier response to the US and Israel's joint attack on the country on 28 February, which sent shockwaves through global energy markets. The incident marked a turning point, prompting Iran to assert its right to protect its interests. The current move is part of a broader strategy to pressure the US into upholding the terms of the agreement. "Our attendance at these talks will be aimed at demanding that the other side fulfill its commitments," said Iran's foreign ministry spokesman, Esmail Baghaei.

Historical Significance and Economic Impact

The Strait of Hormuz is not only a vital shipping lane but also a symbol of geopolitical power in the region. Its closure would disrupt the flow of energy resources, affecting both Middle Eastern producers and their international clients. The 2025 data from the US Energy Information Administration highlights the strait's role in sustaining a massive volume of oil and LNG trade, underscoring the potential economic fallout from any prolonged disruption.

As tensions persist, the situation in Lebanon remains a focal point for both sides. The US has criticized Israel's ongoing operations, which have drawn Lebanon into the conflict following Hezbollah's rocket attacks in retaliation for US-Israeli strikes that killed Iran's supreme leader. This interconnected web of alliances and hostilities has created a precarious balance, with the strait serving as a critical battleground for diplomatic and military leverage. The immediate closure of the strait signals Iran's readiness to escalate pressure, while the US seeks to maintain stability through dialogue and reassurance.