Some senior officers are also thinking to hand over the case to Central Crime Branch (CCB).
Amid frenzied speculations of Kannada superstar Kiccha Sudeep joining the ruling BJP, an alleged threat letter was received by his manager, prompting the police to register a case.
According to the police, Kiccha Sudeep's manager Jack Manju received a letter from an unknown person, threatening to release the actor's "private video" on social media.
Acting on the complaint lodged by the actor's manager, the Puttenahalli police registered a case under sections 504, 506 and 120 (B) of the Indian Penal Code (IPC).
Some senior officers are also thinking to hand over the case to Central Crime Branch (CCB), sources said.
Further investigation is underway in the matter, said police.
Meanwhile, speculations are rife that the Kannda superstar will be joining the BJP on Wednesday, ahead of the May 10 Assembly elections.
The counting of votes for the Karnataka Assembly has been scheduled on May 13.
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)