Shiv Sainiks staged protests in the city and surrounding localities and pelted stones at buses following a controversial Facebook post which contained alleged derogatory references to warrior king Shivaji and Sena leader late Bal Thackeray.
About eight buses were damaged in the incidents that took place last night and as the Sena activists took to the streets and filed complaints with police demanding immediate removal of the post, police said.
Shops in various areas of the city downed their shutters this morning in response to appeal by the Sainiks to join the protest.
Cyber crime branch of police said the post was now deleted from the social networking site and urged the protesters to maintain calm.
The situation was under control, police said, adding that they were investigating into the source of the controversial post of the concerned Facebook account.
An FIR has been registered here against an unidentified person for posting controversial pictures containing alleged derogatory references to warrior king Shivaji and Shiv Sena leader late Bal Thackeray on social networking site Facebook, police said.
The FIR was registered against the person last night under IPC section 295A (deliberate and malicious acts, intended to outrage religious feelings of any class by insulting its religion or religious beliefs) and relevant sections of the IT Act, an official at Mulund Police Station said.
After spotting the Facebook posts which contained the alleged derogatory references, Shiv Sena activist Avinash Bagal complained at the police station.
According to sources, Cyber Cell of the Mumbai police had, with the help of Facebook administration, blocked one account which contained objectionable pictures last night.
However, a second Facebook account had been created by an unidentified person which was also blocked by police with the help of social networking site.
In 2012, two girls were arrested over a controversial Facebook post on Shiv Sena chief Bal Thackeray.
