India summoned Pakistan’s top diplomat in New Delhi on Wednesday after naval vessels from the two countries collided in international waters of the northern Arabian Sea, escalating friction more than a year after their last military confrontation.
The Ministry of External Affairs said Pakistan’s Charge d’Affaires was called in and a strong protest lodged over what it described as “unacceptable and unprofessional conduct” by Pakistani naval units. The ministry said the conduct led to a collision with a unit of the Indian Navy and urged Pakistan’s authorities to ensure that military units exercise due care and observe existing bilateral agreements.
The collision occurred on Tuesday while a frontline warship from India was conducting what officials described as a routine surveillance mission. Officials from India said a Pakistan Navy vessel approached at high speed before the vessels collided. No major damage was reported, and there was no immediate public statement from Pakistan’s government or military responding to New Delhi’s account.
India also instructed its top diplomat in Islamabad to lodge a similar protest with Pakistan’s Foreign Ministry. The exchange elevated what could otherwise have remained a maritime safety incident into a formal diplomatic dispute between two nuclear-armed neighbours whose military contacts are governed by a series of confidence-building arrangements.
New Delhi said the episode breached a 1991 bilateral agreement covering military exercises, manoeuvres and troop movements. Under that agreement, naval ships and submarines of the two countries are required to remain at least three nautical miles apart in international waters to reduce the risk of accidents. India’s foreign ministry said the Charge d’Affaires had been asked to convey the need for all military units to respect those provisions and prevent a recurrence.
Pakistan had not, as of Wednesday afternoon, issued its own description of the encounter, leaving key operational details — including the precise movements of the vessels before impact — based on India’s official account. No ship names, casualty reports or detailed damage assessments were released publicly by either side.
The incident is the clearest publicly acknowledged military encounter between the neighbours since four days of hostilities in May 2025. That fighting followed an April 22 attack on tourists in Pahalgam, in Jammu and Kashmir, that killed 26 people. India blamed Pakistan for supporting cross-border terrorism, an allegation Islamabad rejected, and the crisis developed into missile, drone and artillery exchanges before both sides announced an understanding to halt the fighting.
Relations have remained strained since then despite the cessation of large-scale hostilities. Diplomatic ties had already been downgraded in 2019 amid disagreements over Kashmir, and neither country currently posts an ambassador in the other’s capital, with missions headed by Charges d’Affaires.
The latest protest focused narrowly on maritime conduct rather than broader political disputes. India’s statement did not announce retaliatory military measures or new diplomatic restrictions, and it called instead for compliance with the bilateral framework designed to prevent accidents between armed forces operating near one another.
The northern Arabian Sea is routinely used by both navies for patrols, exercises and surveillance. The 1991 agreement was intended to create practical safeguards at times of tension, alongside notification procedures for certain military activities. Its distance requirement gives commanders a defined separation standard when vessels or submarines from the two countries encounter each other beyond territorial waters.
The military relationship remains sensitive because both countries maintain forces across the Line of Control in Kashmir and continue to accuse each other of hostile activity. Their 2025 confrontation demonstrated how quickly a security incident can widen across domains, although neither government indicated on Wednesday that the naval collision had triggered wider force movements or changes in military posture.
Tuesday’s collision did not produce the kind of damage that would normally force a ship out of service, according to India’s account. The absence of reported casualties limited the immediate operational consequences, but the diplomatic summons ensured the episode received attention at the highest working level between the two foreign ministries.
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