New Delhi, 14/4: In a major development, Delhi chief minister Arvind Kejriwal has been summoned by the CBI on Sunday (April 16) for questioning in the Delhi excise policy case. The summons comes as AAP leader and former Delhi deputy chief minister Manish Sisodia is in jail in connection with the same case and the investigative agencies have made several arrests. Kejriwal has also received a summon from the Goa Police regarding a case of an alleged defacement of public property for which he will have to be present for questioning on April 27. This is the first time that the agency has summoned the chief minister in the case, though the BJP has been claiming that Kejriwal was the mastermind behind the alleged scam