A case has been filed against the duo under Section 67 of the IT Act and 292 of IPC, both of which deal with obscenity, by the Cyber Crime wing of the City Police based on a complaint, a senior official said.
Investigations will start from tomorrow, which could include issuing of summons to them, he added.
Earlier, a case was filed against the actor and composer by Coimbatore Police on a complaint that their popularly described 'beep song' had denigrated women.
Simbu and 'Kolaveri Di' fame music composer R Anirudh have landed themselves in trouble for allegedly singing and composing music for the video "Beep Song" with highly objectionable references to women.
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Anirudh had denied outright composing the song, while Simbu had said that it was not released officially.
The composer, who is in Canada now, had also written to the police, seeking revocation of the case against him.
He admitted that he had sung the song, but claimed it was only a draft version which had been "stolen" by someone and uploaded on the internet and was not officially released by him.
"In fact, the song is only an advice to men to not criticise women for their love failure and that they should not take to smoking and drinking in such cases," he told a Tamil TV channel.
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Meanwhile, The South Indian Artistes Association (SIAA)
Though people had "relaxed the boundaries of cinema," they however will not tolerate when things go beyond such boundaries, SIAA President M Nasser said.
"Since the 'beep song' denigrated women, it is condemnable," he said in a SIAA statement.
He said a performer is duty bound to either apologise or give an explanation if his opinion creates a negative impact.
Nasser said the association had not responded so far since it was busy with flood relief activities.
Moreover, it had remained silent since an immediate response against Simbu would have been perceived as "vindictive action" since he hailed from the opposite camp, the SIAA President said.
The episode has served as a lesson for all performers, Nasser said, adding they have to be careful in future to ensure such incidents were not repeated.