Rajya Sabha MP Kapil Sibal on Saturday hit out at the BJP-led Centre over the CBI summoning Delhi Chief Minister Arvind, alleging that "persecution" was on course. The CBI on Friday summoned Kejriwal to appear before it on April 16 in connection with the excise policy scam case in which his former deputy Manish Sisodia was arrested last month. Reacting to the development, Sibal said on Twitter, "CBI summons Kejriwal, BJP says: Law on course. My take: Persecution on course!"