Activists of a local outfit were arrested when they tried to show black flags to Union Minister of State Rajyavardhan Singh Rathore here while protesting over the Siruvani dam issue.
A total of 35 activists of Thanthai Periyar Dravida Kazhakam (TPDK), led by its general secretary K Ramakrishnan, were arrested, police said.
The demonstration was organised to protest against the Centre for giving its nod to an environmental assessment study by Kerala to construct a dam across river Siruvani, the lifeline of three western districts of Tamil Nadu, including Coimbatore, they said.
The protesters raised slogans against the Centre and also the Kerala government.
They also protested Rathore’s participation in the ‘Isha Gramotsav’, organised by the city-based Isha Foundation, which recently faced allegations of brainwashing and illegally detaining some inmates of a yoga centre run by it.
A local judge, deputed by the Madras High Court, has however given a clean chit to the foundation, saying the inmates were staying in the centre at their own will.