The case has been registered against Khan under Section 506 (punishment for intimidation) of IPC which is a non- cognisable offence, on the complaint of a group of protesters, a senior police officer said.
The complainant Syed Tanveer Ahmad, a resident of Shaheen Bagh in Okhla, said he, along with others, was protesting against civic woes and alleged underdevelopment of the constituency under the AAP government on July 16.
Tanveer alleged the MLA intimidated him saying he would "cut him into pieces and throw in Yamuna" if he did not comply.
Based on the complaint of Tanveer and other protestors, including Sultan Ahmad and Syed Abdul Ali, a non-cognisable offence case was registered July 24 at Jamia Nagar Police station.
Khan, who is also chairman of Delhi Waqf Board, was arrested on July 24 from his Batla House residence for allegedly threatening a woman who had visited his house to raise the issue of power cuts.