Three protesters were killed on Tuesday in clashes between mobs and security forces in the Kashmir Valley, police said.
A 24-year-old youth identified as Shahid Ahmed was killed in Shopian district when a mob attacked security forces after Eid prayers.
Jallaluddin, 45, died of a heart attack during a clash with police in Awantipora town of Pulwama district.
Police said a tear smoke shell fired at the protesters abruptly dropped into the mosque where Jallaluddin died.
Earlier, another youth, Murtaza, 25 was killed in clashes in Bandipora district.
Authorities have imposed a curfew in all the 10 districts of the Kashmir Valley to prevent large-scale violence.
No major Eid congregation was allowed anywhere. Separatists had asked the people to march to the Sonwar headquarters of the UN Military Observer Group in India and Pakistan (UNMOGIP) in Srinagar after the prayers.
Authorities imposed curfew in all the 10 districts of Kashmir on Wednesday to prevent post Eid prayer protests called by the separatists.
Authorities disallowed Eid congregation in Srinagar and all others major cities and towns to avoid large scale violence. People could offer prayers only in mosques.
Police constable, Rouf Ahmed, who was injured in a gunfight in Srinagar's Nowhatta area on August 15, succumbed to injuries earlier on Wednesday.
Militants hurled a grenade at the Sherbagh police station in Anantnag town on Tuesday evening which killed civilian, Bilal Ahmed on the spot with 17 others injured.
Except clashes in Batamaloo area between a stone pelting mob and security forces, no reports of any major violence was reported so far.