Protests rocked the Cauvery river basin district of Karnataka for the second day on Monday over release of Cauvery water to Tamil Nadu with police taking about 100 people into custody after they squatted on tracks and detained the Mysore-Shirdi express at Gejjalagere village.
People in Mandya, Mysore and Chamarajanagar districts also protested against the release of water in line with a Supreme Court directive.
The Karnataka government began releasing water from Krishna Raja Sagar and Kabini dams early on Sunday to ensure flow of 9,000 cusecs of water to the neighbouring state.
Police said about 100 people were taken into custody when they squatted on the tracks and detained the Mysore-Shiradi express at Gejjalagere village.
Vehicular movement on the Bangalore-Mysore road continued to remain disrupted for the third consecutive day, they said.
In Mysore, activists of Karnataka Rakshana Vedike staged a dharna in front of the deputy commissioner's office.
Chief Minister Jagadish Shettar had told mediapersons on Sunday it was "inevitable" for government to release water to comply with the Apex Court order, but that the state was committed to protect the interests of farmers.
He had also said the state would file a petition before the Supreme Court, seeking a review of its order asking the state to honour the Cauvery River Authority directive to release 9,000 cusecs to Tamil Nadu till Oct 15.
Karnataka has already urged Prime Minister Manmohan Singh, also the CRA chairman, to review its September 19 order and keep it in abeyance till the decision was reviewed.