The SIT said there were two sketches which were similar because they were made by two artists based on different eyewitness accounts.
Police quoted eyewitnesses as saying that they saw the suspects in the area nearly seven days prior to the crime.
The chief of the investigating tribunal also cautioned that the religion of the suspects could not be determined on the basis of their external appearance like tilak or
earrings because this could have been done to mislead.
"We have investigated 200-250 people in connection with the case," BK Singh said.
He also clarified that there was no confirmation that the weapons in the Gauri Lankesh murder and the MM Kalburgi case were the same.
Gauri Lankesh was shot outside her Bengaluru home on the evening of September 5.
The man who shot her had arrived at the scene on a motorcycle with another man and was wearing a motorcycle helmet when the murder took place.
On October 4, Karnataka home minister Ramalinga Reddy said the SIT had identified the killers and had clues but that police was trying to collect proper evidence.
Gauri Lankesh edited the anti-establishment Gauri Lankesh Patrike.
Her killing was very similar to the earlier killings of the rationalists and activists Govind Pansare, Narendra Dabholkar, and MM Kalburgi who were equally critical of the right wing.
SIT chief BK Singh said the sketches were being released because the police wanted the co-operation of the people ||Police quoted eyewitnesses as saying that they saw the suspects in the area nearly seven days prior to the crime