Former Andhra Pradesh Chief Minister Chandrababu Naidu, his son Nara Lokesh and several leaders of his Telugu Desam Party (TDP) have been put under house arrest to prevent them from participating in a massive protest against the government run by YS Jagan Mohan Reddy. Large gatherings are banned by the police in Palnadu region, seen to be worst affected by violence fuelled by political rivalries. "It's a dark day for democracy," said Mr Naidu, adding the police action is "atrocious" and "unprecedented in history". "This government is violating human rights and fundamental rights. I am warning the government. I am warning police also. You cannot control us by arresting us," Mr Naidu told reporters at his home. He will sit on a fast till 8 pm today. Some of the TDP leaders who are under house arrest are Devineni Avinash, Kesineni Nani and Bhooma Akhilapriya.