Reyaz Ahmad Khanday succumbed to injuries at SKIMS Hospital here late last night after battling for life for three days, a police spokesman said.
He said Khanday was hit by a stone on the head on March 8 at Mattan when a mob attacked him while he was driving a load carrier.
Authorities had imposed curfew in many parts of the Valley on the day as separatist Majlis Mashawarat (Consultative Committee) had called for protests seeking return of mortal remains of Guru, who was hanged and buried inside Tihar Jail on February 9.
While two persons were killed in alleged firing by security forces in different incidents in Baramulla, two youth drowned in Ganderbal district while allegedly being chased by security forces while dealing with law and order situation.