Police in India's Andhra Pradesh state have arrested a human rights activist for allegedly posting defamatory remarks on Facebook against a local politician.
Jaya Vindhyalaya was arrested in Prakasam district on the complaint of legislator Krishna Mohan, police said.
She was produced in court and was remanded in jail for 12 days.
Last year, India issued new guidelines making it harder for the police to arrest people for comments on internet.
The move followed outrage after a series of arrests of people for their comments on Facebook and other internet sites.
Ms Vindhyalaya is the president of People's Union of Civil Liberties (PUCL) in Andhra Pradesh.
She is lodged in a jail at Ongole and could not be reached for comments. Her lawyers have applied for bail.
She has been arrested under Section 66A of the Information Technology Act which is sweeping in its powers - it can send a person to jail for three years for sending an email or other electronic message that "causes annoyance or inconvenience".
Ms Vindhyalaya has defended her remarks on Facebook, senior police officer K Raghurami Reddy told the BBC.
Before her arrest, Ms Vindhyalaya had alleged that Mr Mohan was targeting her due to "political enmity" and had "threatened the local people against deposing before a team of PUCL which had gone on a fact-finding mission against the legislator".
Mr Mohan has denied the charges.
Police say they have written to Facebook to remove the "objectionable material" from her page.
