Gauri was shot dead outside her house by unidentified men who came on a motorcycle on September 5. The modus operandi bore a grim resemblance to the way rationalists Govind Pansare, Narendra Dabholkar and Mr Kalburgi were gunned down.
Additional director general of police (CID) C H Pratap Reddy told reporters that the CID had succeeded in establishing that a similar type of pistol was used to gun down Govind Pansare, Narendra Dabholkar and Mr Kalburgi who was killed in August 2015.
"The modus operandi in all the three previous cases was similar. Murderers came on motorcycles and shot them dead. Initial reports suggest that in the Gauri Lankesh case too, the assailants came on a bike and shot her dead," he said.
However, he said at this point it would be premature to say it was the handiwork of the same people who killed Mr Kalburgi.
"The SIT is working on it and they are better positioned to say anything on this," Mr Reddy said.