They said the delay of three days in lodging the FIR was due to large number of posts on the Facebook page of Kashmir's all-girl band 'Pragaash', that took time to get scanned.
A case in the matter has been registered under Section 66A of IT Act and Section 506 RPC (criminal intimidation) in the Rajbagh police station here.
A member of the band had yesterday said they decided to call it quits as they respected the decree of Kashmir's grand mufti who found singing un-Islamic.
"We respect the Mufti sahib who said it (singing) is 'Haram'. We respect the opinion of people of Kashmir also. That is why we quit," she said adding that the band was not disbanded because of online threats.