Rajya Sabha MP Kapil Sibal on Saturday hit out at the BJP over the CBI summoning Delhi Chief Minister Arvind, alleging that the ruling party wants to establish an "Opposition-free India" and is seeking to "malign" the image of leaders who stand up against it.

Sibal urged all Opposition parties to speak up in one voice against this "misuse" of probe agencies and asserted that it will be difficult to take on the BJP until all such parties stand together.