"If activists are harassed or killed, it is a serious matter. If there are proofs of involvement of any group, action must be taken," Minister of State for Home Kiren Rijiju told reporters on the sidelines of a function here.
He was responding to a question on police interrogating right wing group Sanatan Sanstha member Samir Gaikwad in connection with the murder of Pansare.
Pansare died four days later at the Breach Candy Hospital in Mumbai. His wife survived the attack, but suffered injuries that have crippled her.
NIA had probed the involvement of Sanatan Sanstha members in the Madgaon bomb-blast case in Goa in 2009.
