A two-year-old child was killed and six people injured after a grenade exploded inside the home of Jasbir Singh, a local BJP leader, in Jammu and Kashmir's Rajouri yesterday evening.
It is unclear, at this time, if the incident was a terrorist attack.
Officials have said the explosion initially wounded seven family members, including Mr Singh.
A two-year-old nephew of Mr Singh - identified by news agency PTI as Veer - later died from injuries sustained in the blast while receiving treatment at a government hospital.
Sources told PTI that the child's body has handed over to the family for the last rites.
The BJP has strongly condemned the attack and Ravinder Rana, the head of the party's J&K unit, has appealed to the police to immediately arrest those responsible.
Mr Singh's family has alleged inadequate security cover, according to PTI.
The family told police a grenade had been thrown at their house. Initial reports suggest it exploded on the rooftop.
Police rushed to the home and collected samples to ascertain the nature of the explosion.
Soon afterwards locals gathered and raised slogans against the administration.
A shutdown call was sounded after the explosion and shops in most parts of the town are closed.
On Monday another local BJP leader - Ghulam Rasool Dar, a village sarpanch and the district head of the BJP's Kisan Morcha - and his wife were shot dead in south Kashmir's Anantnag town.
With input from PTI
5 Terrorists Killed In Encounter With Security Forces In J&K's Kulgam After Terror Attacks, Amit Shah To Review Security Grid In Jammu And Kashmir Statehood, Lt Governor's Powers In Focus As Omar Abdullah, Amit Shah Meet Tomorrow Pics: Rahul Gandhi's Family Lunch At Iconic Delhi Restaurant 3 Khalistani Terrorists, Who Attacked Punjab Cops, Killed In UP Encounter Donald Trump Appoints Indian-American, Elon Musk Aide As AI Advisor Who Is Sriram Krishnan, Indian-American Appointed Donald Trump's AI Advisor Thepla And A Drink: Liquor On 1st Surat-Bangkok Flight Runs Out, Officials Say... "Ran For My Life": Gurgaon Woman Shares Traumatic Experience With Ola Cab Track Latest News Live on NDTV.com and get news updates from India and around the world.