In a statement posted on Facebook, the Editors' Guild of India condemned what it called the "dastardly attack" on Bukhari.
The police bodyguard of senior journalist Shujaat Bukhari is carried away after an attack in Srinagar, at Press Colony in Srinagar.
Bukhari was given police protection since an attack on him in 2000.
The three militants were caught on a CCTV camera, the police said. The attackers had their faces covered.
The name of the person providing any clue or information regarding the suspects will be kept confidential. Bukhari, who is survived by his wife, a son and a daughter, was an advocate of peace and favoured peaceful resolution of the Kashmir issue.
Thousands of friends and admirers on Friday joined the funeral procession of veteran journalist Shujaat Bukhari, who was laid to rest in his ancestral village in Kreeri a day after he was shot dead outside his office in Srinagar.
"It is an attempt to silence the saner voices of Kashmir", he tweeted. Later, he established his own English daily Rising Kashmir. His bullet-riddled body later was found in Pulwama.
He had several feathers in his cap. Sources say Rajnath Singh's peace initiative in Kashmir, a ceasefire, may not extend beyond Ramzan, which is expected to end with Eid tomorrow. He also headed the largest literary organization "Adbi Markz Kamraz" and commanded a great deal of respectability among the literary circle in Jammu & Kashmir. "We offer honest condolences to families, friends, & colleagues", tweeted United States ambassador to India Kenneth Juster.
Former chief minister Omar Abdullah tweeted: Even in the last tweet he put out he was defending himself, his colleagues & his profession.
Congress president Rahul Gandhi said he was anguished to hear about the killing of Mr. Bukhari.
West Bengal Chief Minister Mamata Banerjee also expressed shock.
Pakistan's Ministry of Foreign Affairs said in a statement that the killing "cannot be condemned enough", and praised Bukhari for "carrying out his professional responsibilities with courage and conviction".
The Indian Women's Press Corps, Press Association and Federation of Press Clubs of India also expressed "deep shock and outrage at the brazen murder" of Bukhari. "This highlights how much hard conditions journalists are working in Kashmir".
Former Jammu and Kashmir Chief Minister Omar Abdullah visits grieving family of "Rising Kashmir" editor Shujaat Bukhari's family.
The Editors Guild of India while condemning the attack called on the government to ensure safety and security for the media in the state. Journalist community should come together to condemn the incident.