Eleven oil tankers came under attack while transiting the Strait of Hormuz during the week ending October 4, marking the highest number of strikes on commercial ships since the conflict began in late February, according to data from the International Maritime Organization (IMO), a United Nations agency. Five additional tankers were targeted this week, bringing the total to sixteen attacks in two weeks. Twelve sailors were injured on October 7 when a projectile struck their vessel, the On Peace, as it transited the strait. The sailors were Indian nationals, and the ship is owned by the United Arab Emirates, per Marisks, a maritime security firm.
U.S. military escorts and regional responses
The surge in attacks follows a rebound in Middle Eastern crude oil exports to prewar levels in September, facilitated in part by U.S. military escorts using a route along Oman’s coast. The Joint Maritime Information Center (JMIC), a coalition of U.S.-allied militaries based in Bahrain, issued a warning on October 10 advising commercial ships to exercise heightened caution. The JMIC stated, “These actions continue to demonstrate Iran’s intent to assert its presence along key transit lanes and maintain pressure on transiting vessels.”
Iranian statements and regional reactions
A senior Iranian Revolutionary Guard Corps (IRGC) official told Fars News Agency on October 9 that Iran would block all “illicit routes” through Hormuz. The IRGC, designated a terrorist organization by the U.S., has not publicly specified which routes it considers illicit. Meanwhile, Richard Meade, editor-in-chief of the shipping industry trade journal Lloyd’s List, described the situation as “not a sustainable new normal” during a briefing on October 10.
Human and economic toll
At least nine sailors have died in ship attacks since July, per IMO data. Michelle Wiese Bockmann, a senior maritime intelligence analyst at Windward, noted that while oil volumes are reaching prewar levels, they are doing so “at a time of extremely high maritime risk.” The U.S. Central Command has not issued a public statement on the recent escalation as of October 11.
Background: The conflict and its stakes
The Strait of Hormuz, a critical chokepoint for global oil transit, has seen heightened tensions since late February, when attacks on shipping lanes began increasing. The strait accounts for roughly 20% of the world’s oil supply, making it a focal point for regional and international powers. The U.S. has previously cited its escort operations as a measure to ensure the free flow of commerce, while Iran has framed its actions as responses to perceived provocations, including sanctions and military deployments.
Maritime security measures
The IMO has called for enhanced vigilance, emphasizing that the recent attacks reflect “a pattern of deliberate disruption” in one of the world’s most strategically vital waterways. Shipping companies have begun rerouting vessels or increasing security protocols, though no major oil companies have publicly announced suspensions of Hormuz transits.
Ongoing developments
The situation remains fluid, with no immediate signs of de-escalation. The IRGC’s public statements and the JMIC’s warnings suggest that further incidents could occur. The international community continues to monitor the strait, with calls for diplomatic solutions growing amid the sustained disruption to global energy markets.