The party, in an editorial in the forthcoming issue of its mouthpiece People's Democracy, said the Centre's alleged manipulation of cases concerning "Hindutva terrorist attacks are dangerous portents".
Former party General Secretary Prakash Karat, who penned the editorial, said the revelations by Salian were "serious" and have "disturbing" implications.
"The communal outlook of Government on terrorism and manipulation of cases concerning the Hindutva terrorist attacks are dangerous portents.
Specia Public Prosecutor in the explosion case Salian had on June 25 claimed that an officer of NIA had in May last year asked her to "go soft" on the case.
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This was followed by her being asked not to appear in the case.
"After Modi Government's coming to power, the NIA stance of going slow on these cases and scuttling them had become apparent. Salian's courageous expose has only confirmed this diabolical attempt to protect those guilty of terrorist crimes. By the perverse logic of Sangh combine only Muslims can be terrorists, not Hindus," Karat said.