Hours after the BJP released what it called a "sting operation" to claim the AAP government in Delhi framed its liquor policy to help a select few, Deputy Chief Minister Manish Sisodia threw a challenge in response. "BJP should give this so-called sting to the CBI, which anyway is working like an external agency of the party. In the next four days - till Monday - the CBI should arrest me if there's any proof of corruption in this 'sting'," Mr Sisodia said to reporters' questions. "If they don't, that'll be proof that this is an attempt to overthrow our government by the BJP. Just an attempt to malign us."