The Indian army named the dead officer as Major Moharkar Prafulla Ambadas, while the injured soldiers as Lance Naik Gurmail Singh and Sepoy Pargat Singh of 16 Corps, Defence spokesperson Colonel NN Joshi confirmed.
Vowing to avenge the killings, the Indian troops swung into action to silence the Pakistani guns.
Jammu and Kashmir Chief Minister Mehbooba Mufti Saturday paid rich tributes to four Army personnel, including a Major, killed in Pakistani firing along the Line of Control in Jammu and Kashmir's Rajouri district.
Following the incident, heavy cross-border firing and shelling was reported at several locations along the border.
He said two other injured soldiers are undergoing treatment at the hospital. In a strongly worded press statement, the Indian Army warned Pakistan saying martyrdom of Indian soldiers will not go in vain.
Major Moharkar Prafulla Ambadas aged 32 years, belonged to District Bhandara, Maharashtra and is survived by his wife Avoli Moharkar.
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Defence spokesman in Jammu said, "An officer and three jawans were martyred as the Pakistan Army indulged in unprovoked ceasefire violation".
However, among the injured, three soldiers including the major succumbed later, the spokesman said, adding the soldiers manning the fence retaliated the fire strongly and effectively.
Nuclear-armed India and Pakistan claim the divided Kashmir region in its entirety and have fought two wars over it.
In recent years, Kashmiris have openly supported anti-India rebels and sought to protect them by engaging troops in street clashes during military operations against the rebels.
Deputy Chief Minister Nirmal Singh also paid tributes to the slain soldiers.
She conveyed her heartfelt sympathies to the families of slain soldiers.
This year 14 army men, four BSF personnel and 12 civilians have been killed in Pakistan troops firing along the Line of Control (LoC) and International Border (IB) in Jammu and Kashmir.
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