What Happened to Oil Tanker Incidents in the Strait of Hormuz?

The Strait of Hormuz, a narrow waterway connecting the Persian Gulf to the open ocean, is a critical chokepoint through which approximately 20-25% of the world's seaborne oil trade and a significant portion of liquefied natural gas (LNG) passes annually. Historically, the Strait has been a theater for geopolitical tensions, notably during the 1980-1988 Iran-Iraq 'Tanker War'. Tensions resurfaced in 2019 with a series of limpet mine attacks on tankers, which the West attributed to Iran.

Leading up to 2026, tensions between Iran, the United States, and Israel escalated, fueled by failed nuclear negotiations and a prior 12-day air conflict in 2025. This volatile environment culminated on February 28, 2026, when the United States and Israel launched air strikes against Iran, initiating what has been termed the '2026 Iran war' or '2026 Strait of Hormuz crisis'. In retaliation, Iran's Revolutionary Guard Corps (IRGC) issued warnings, boarded and attacked merchant ships, and laid sea mines, effectively blocking the strait. This immediate closure led major oil companies and trading houses to suspend crude and fuel shipments, causing Brent crude oil prices to surge past US$100 per barrel in March, peaking at US$126 per barrel, marking the largest disruption to world energy supply since the 1970s. At its peak, an estimated 14 million or more barrels per day were removed from accessible supply, with hundreds of vessels stranded in the Persian Gulf.

In response to Iran's actions, the United States increased its military presence, deploying naval assets and fighter aircraft to the region. On April 13, 2026, the US imposed a naval blockade on Iran following failed talks, targeting vessels entering or leaving Iranian ports. Despite the blockade, Iran continued to assert control, with its forces attempting to intercept vessels and claiming to strike tankers for violating its declared closure. The US Navy, in turn, conducted operations to guide ships and clear mines, facing Iranian barrages during transits.

A significant turning point occurred on June 17, 2026, with the signing of the Islamabad Memorandum, an interim agreement between the US and Iran aimed at a 60-day toll-free reopening of the strait and a ceasefire. This led to a partial recovery in shipping traffic, with a record 16 million barrels of oil transiting the strait on June 21. However, the ceasefire proved fragile. On June 25, the Singapore-flagged container ship M/V Ever Lovely was struck by an Iranian drone near the Omani coast. Just two days later, on June 27, the Panama-flagged VLCC KIKU oil tanker was hit by an unidentified projectile while transiting the strait. The US responded with retaliatory strikes on Iranian missile and drone storage facilities and coastal radar sites.

As of July 4, 2026, the situation in the Strait of Hormuz remains highly volatile. While oil shipments have rebounded to over 10 million barrels per day, they are still below pre-war levels, and the security environment is described as fragile. The US has strengthened its maritime security presence to safeguard commercial shipping, particularly encouraging the use of the southern shipping corridor near Oman. Concurrently, Iran continues to warn oil tankers to use its designated routes or face a 'forceful response,' describing the Strait as its 'sovereign territory'. Diplomatic efforts are ongoing, but the persistent attacks and competing claims over navigation rights underscore the enduring risks to global energy security posed by the Strait of Hormuz.