The protesters demanded that the film should not be released, a senior police official said.
'Padmavati' helmed by Mr Bhansali is slated to hit theatres shortly. The movie has been facing a lot of trouble since early this year.
Police said that they detained the protesters, but later released them.
Mr Bhansali, had been assaulted by activists of a Rajput community group, the Karni Sena, during the shooting of the film in Jaipur in January. The outfit has been constantly seeking a ban on the movie, claiming it "distorts" history.