The incident took place this morning when Sayed left his house around 0700 hours, and the assailants stabbed him with sharp weapons several times and fled, they said.
According to police, Sayed was rushed to V.S. Hospital by his family members but was pronounced dead on arrival by the doctors.
The attackers are on the run and their identity was not yet known, police said.
The deceased was a witness in the Naroda Patiya case, where 95 persons were killed on February, 28, 2002 during the communal violence that erupted after the Godhra train burning incident.
The court where the case trial was on, had recorded Sayed’s statements a couple of months back.
Sources close to Sayed said he was also a police informer in some cases, and his murder had some connection with the clash between the slaughter house owners and police early this week where two policemen were injured and a police jeep was torched by a mob.
Police said a case has been registered against the unknown persons and further investigations were on.
Sayed was also a RTI activist and he had raised many RTI queries on the Godhra riots and related incidents.