Hamid Dabholkar, son of the slain rationalist thinker and founder of Maharastra Andhshradha Nirmulan Samiti, said there is a "striking similarity" between the three murders.
They claim Wagle has always been writing against them.
The Special Investigating Team probing the murder of rationalist and Left leader Govind Pansare suspects role of two more Sanatan Sanstha members, who are absconding in connection with the 2009 Madgaon blast, in the case, police sources said on Monday.
Another senior officer of Karnataka CID conducted some preliminary enquiries regarding the possible links the hardline outfit with murder of Kalburgi.
Locals of Ramnathi in North Goa district where the Sanatan Sanstha is headquartered, have demanded a ban on the right-wing outfit and urged the state government to ensure that its ashram is shifted out of their village failing which they would intensify their agitation against them and their 'sadhaks' (seekers).