'Bengaluru Bandh' began from 6 am today, September 26, with several pro-Kannada organisations, farmer groups and labour unions protesting the release of Cauvery water to Tamil Nadu at the rate of 5,000 cusecs per day on the orders of the Supreme Court. Shanthakumar and other leaders of the 'Karnataka Jala Samrakshana Samiti were detained by the police at the Mysuru Bank circle, as they were trying to hold a protest march towards Town Hall.