"Though violence levels are at a record low, memories of incidents like Gawkadal reinforce why Kashmir has to be freed of violence and guns," Omar wrote on a micro-blogging site.
"Today marks the anniversary of a very dark day in the recent history of Kashmir. The Gawkadal killings symbolise much of what went wrong (in Kashmir)," he wrote.
On that day, CRPF personnel opened firing on a large procession at Gawkadal in the heart of the city during protests against alleged molestation of women by the security forces in many parts.
Separatist groups have called for a general strike in Gawkadal and adjoining areas today to pay tributes to those who were killed in the incident.