Iran Conducts Series of Oil Tanker Attacks in Persian Gulf and Strait of Hormuz

Iran has conducted a sustained campaign of attacks against oil tankers operating in the Persian Gulf and Strait of Hormuz, according to multiple reports spanning from March through September 2026, marking an escalation in maritime tensions that threatens one of the world’s most strategically vital energy corridors.

The Islamic Revolutionary Guard Corps Navy has targeted at least six commercial vessels over a six-month period, employing anti-ship missiles and underwater drones in coordinated strikes that have raised international concerns about freedom of navigation and the security of global oil supplies.

The earliest documented incident occurred on March 7, when the IRGC Navy launched an anti-ship missile attack on an oil tanker near the United Arab Emirates coast in the Persian Gulf region, according to reports from the Middle East Spectator ^[1]. Three weeks later, on March 24, the IRGC announced it had struck an American oil tanker in the northern Persian Gulf with a missile, stating the vessel caught fire and was unable to continue its journey ^[2][3].

The campaign intensified during August. On August 1, Iran struck an oil tanker 11 nautical miles off the coast of Oman in the Strait of Hormuz, according to the UK Maritime Trade Organisation ^[4]. A week later, on August 9, Iran launched another attack on an oil tanker in the Strait of Hormuz ^[1]. On August 10, the IRGC Navy reportedly attacked an oil tanker off the coast of Oman, with reports describing the incident as part of a pattern of regional security concerns ^[5]. On August 18, Iran struck the Emirati oil tanker ‘AL WATAN’ in the Strait of Hormuz ^[1][4], with one report indicating Iran used underwater drones in the operation ^[4].

The most recent incident occurred on September 9, when Iran launched an attack on an oil tanker off the coast of Iraq, according to recent reports ^[1]. The incident occurred in the Persian Gulf, raising concerns about regional security and potential escalation.

The Strait of Hormuz, through which roughly one-third of global maritime oil trade passes, has become the focal point of these operations. The sustained nature of the attacks suggests a deliberate Iranian strategy rather than isolated incidents. The use of anti-ship missiles and underwater drones indicates technological sophistication in the targeting operations.

These incidents occur against a backdrop of broader regional tensions. According to available sources, Iran’s Foreign Minister Seyed Abbas Araghchi has been engaged in diplomatic discussions regarding bilateral relations and cooperation, though reports indicate internal factional rifts within Tehran over regional strategy ^[6]. Meanwhile, Gulf state allies have expressed concerns over the regional consequences of Iran’s economic management and military posturing ^[7].

The targeting of commercial vessels – including vessels flagged to the United States and the Emirates – directly threatens international commerce and has prompted responses from maritime authorities. The UK Maritime Trade Organisation has documented multiple incidents, indicating these attacks are not isolated or unconfirmed claims but constitute a documented pattern affecting global shipping.

The implications for Indo-Pacific energy security are substantial. Disruptions to oil flows through the Strait of Hormuz reverberate across global energy markets and affect economies far beyond the Middle East. The attacks underscore the vulnerability of critical maritime infrastructure to state-sponsored military operations and raise questions about the ability of international maritime law and security arrangements to protect commercial shipping in contested waters.