Govind Pansare murder accused Virendra Tawde was also arrested for Narendra Dhabolkar's killing.
The SIT probing the Govind Pansare murder case has filed a supplementary chargesheet against Sanatan Sanstha member Virendra Tawde at a court in Kolhapur.
The over 400-page supplementary charge sheet was filed in Kolhapur sessions court yesterday.
Mr Tawde, earlier arrested by CBI in the Narendra Dabholkar murder case, was in September taken into custody by Kolhapur police in connection with the murder of CPI leader and rationalist Govind Pansare.
Mr Tawde is the second accused named in the Pansare murder case by the state Special Investigation Team.
The SIT had already filed a chargesheet against Sameer Gaikwad, another member of Sanatan Sanstha, in the Pansare murder case.
"We filed the supplementary charge sheet against Tawde here in Kolhapur sessions court," said Additional Superintendent of Police Suheil Sharma, the investigating officer in the murder case.
However, he refused to divulge any information on the charges levelled against Tawde.
"I can only confirm that the charge sheet of over 430 pages has been submitted in the court," he said.
However, police sources said that charges against Mr Tawde are likely to be similar to the ones under which Sameer Gaikwad has been charged.
Mr Tawde was first arrested by the CBI in the Dabholkar case in June this year from Panvel and later the state SIT arrested him on September 2 this year in the Pansare case.
Mr Gaikwad was arrested in September last year in the Pansare murder case.
Mr Tawde had worked as an organiser for the conservative Hindu outfit Sanatan Sanstha in Kolhapur for some time, and therefore he came under the scanner of state police SIT probing the Pansare murder case, police had earlier said.
Mr Pansare, known for his rationalist views, was shot dead in Kolhapur on February 20, 2015. His wife too was injured in the attack.
Mr Dabholkar, a noted anti-superstition activist and rationalist, was murdered in Pune on August 20, 2013.