There was tension in parts of western Maharashtra on Sunday over some objectionable posts found on Facebook against warrior kings Shivaji Maharaj and Sambhaji Maharaj and Shiv Sena leader Balasaheb Thackeray. The content was removed from the website early on Sunday.

Chief Minister Prithviraj Chavan said the posts might have been created outside the country. He said it was a sinister plot to disturb social harmony."We are taking help from the Centre and from international agencies to find out who is behind this plot," he told reporters during a press meet here.

According to the police, a few buses were burnt and damaged in Pune, Ahmednagar, Usmanabad, Kolhapur. Mobs resorted to rasta roko. There were reports of Shiv Sena agitations in various parts of the State. Police and political parties have appealed for peace.

"The cyber cell of the Mumbai Crime Branch has started investigation. The officials contacted Facebook in America. The objectionable content was deleted by 1 a.m. on Sunday," Sadanand Date, Mumbai Joint Commissioner of Police (Crime), said.

The Shiv Sena upped its ante against the State administration. Many party officials filed FIRs at various places against unknown persons.

"There is no cyber surveillance by the State. This tendency to malign great people needs strict action," Sena spokesperson Neelam Gorhe told The Hindu .