Three Indian sailors were killed and two others seriously injured when U.S. forces struck tankers in the Gulf of Oman accused of circumventing Iran sanctions, triggering a sharp diplomatic protest from New Delhi and adding a volatile new dimension to an already tense Gulf conflict that has disrupted global shipping lanes for months.

Three Incidents in Three Days

Indian government officials confirmed Thursday that three separate maritime incidents occurred between June 8 and June 10 involving vessels crewed largely by Indian nationals. The first, involving the tanker MT Marivex on June 8, resulted in a fire that forced the evacuation of all 24 crew members, who were rescued safely by U.S. Navy personnel operating in the vicinity.

The second and third incidents proved fatal. The MT Settebello, struck on June 10, suffered a direct hit to its bridge section. Three crew members — identified by Indian officials as nationals from Maharashtra and Kerala — were killed and three others were hospitalized with critical injuries. Hours later, a third vessel, the MT Jalveer, was struck by what Indian naval attachés described as precision munitions targeting the engine room. All 20 crew members aboard the Jalveer were evacuated safely before the vessel took on water.

The Indian Ministry of External Affairs confirmed the deaths and injuries in a formal statement Thursday and described all three vessels as engaged in "legitimate commercial activity" under contracts predating the U.S. naval blockade of Iranian oil exports. "India views with grave concern any action that endangers the lives of Indian nationals at sea in what are international waters," the statement read.

India Summons U.S. Ambassador

The Ministry of External Affairs summoned the U.S. Ambassador to India to South Block on Thursday for a formal diplomatic protest — the most serious step short of recalling an ambassador that New Delhi has taken with Washington in years. The meeting lasted approximately 90 minutes, according to a senior official in the Indian foreign ministry who was briefed on its contents.

"India made clear that the targeting of vessels carrying Indian crew, in waters where these sailors had every right to operate, is unacceptable and requires an immediate explanation," the official said, speaking on the condition of anonymity. "The ambassador received that message and conveyed that Washington would respond formally within 48 hours."

The State Department confirmed the meeting but declined to provide details, saying only that the United States "values its relationship with India and is committed to open communication regarding operations in the Gulf region." A defense official, speaking separately without attribution, said U.S. forces had issued multiple radio warnings to the vessels before acting and had followed established rules of engagement for sanctions enforcement.

A Diplomatic Relationship Under Strain

Thursday's confrontation lands at a sensitive moment for U.S.-India ties, which have generally strengthened under successive administrations but have faced friction over India's continued purchase of Russian oil and its reluctance to formally align with Western sanctions regimes. New Delhi has historically maintained what officials describe as a policy of "strategic autonomy" — sustaining trade relationships across geopolitical divides rather than fully joining Western-led economic coalitions.

In Houston, the U.S.-India Business Council issued a statement calling for "immediate diplomatic clarity" and warning that the incident could disrupt the $200 billion bilateral trade relationship the two countries have built over the past decade. Indian shipping industry associations separately called for an emergency review of crew assignment policies for Gulf-bound tankers, and at least two major Indian crewing agencies said they were suspending new placements on vessels transiting the Gulf of Oman until the situation clarified.

Complications for the Iran Ceasefire Framework

The incidents also complicate President Trump's announced Iran ceasefire framework, which is expected to include Strait of Hormuz reopening provisions and a gradual normalization of Iranian oil exports. If New Delhi concludes that U.S. enforcement operations extended recklessly into legitimate commercial shipping lanes, the diplomatic fallout could add significant noise at a moment when the administration is seeking to declare a major foreign policy victory.

Senior Indian officials said privately that the country's posture at the upcoming G20 preparatory meetings — where U.S. officials have been seeking support for their Iran policy framework — would be affected by how Washington responds to Thursday's protest.

Indian Crew in the Gulf: A Dangerous Geography

Indian nationals make up one of the largest national groups in the global maritime workforce, with an estimated 250,000 Indian sailors serving aboard merchant vessels worldwide — approximately 12 percent of the global seafarer population, according to International Maritime Organization data. The Gulf of Oman has been one of the highest-risk transit corridors for commercial shipping since the Iran conflict intensified last year.

Maritime insurers began sharply raising war-risk premiums for Gulf-bound vessels in late 2025, and several major shipping companies temporarily suspended Gulf of Oman transits before U.S. Navy escort arrangements were offered. Industry sources in London said Thursday's confirmed fatalities would likely trigger another round of premium increases that could push some voyages entirely out of commercial viability.

For the families waiting on news in Mumbai and Kerala, Thursday's announcement brought the kind of grief that statistical risk assessments cannot capture. The three sailors killed aboard the Settebello — a cook and two deck officers — had boarded the vessel eight weeks earlier on standard six-month contracts. They were not supposed to be home until August.