On 12 September 2016, hours after the Supreme Court modified its order and directed Karnataka to release 12,000 cusecs of Cauvery water a day to Tamil Nadu until 20 September, mobs in Bengaluru torched dozens of Tamil Nadu-registered buses and trucks. One man was killed in police firing and another died fleeing a lathicharge, curfew was imposed in 16 police station limits, and police later reported 1,045 arrests. Tamil Nadu saw retaliatory attacks and a statewide bandh on 16 September. In February 2018 the Supreme Court cut Tamil Nadu's share.
Background: a distress year and a 2007 award
In 2007 the Cauvery Water Disputes Tribunal allocated 419 tmc ft to Tamil Nadu and 270 tmc ft to Karnataka out of 740 tmc ft, and said shares would be cut proportionately in a distress year. The Centre notified the award in 2013 The News Minute.
On 22 August 2016 Tamil Nadu asked the Supreme Court to direct Karnataka to release 50.052 tmc ft for its samba crop. On 2 September the court asked Karnataka to consider it on humanitarian grounds. Karnataka offered 10,000 cusecs a day and Tamil Nadu asked for 20,000 Onmanorama.
How it started: the 5 September order and the 9 September bandh
On 5 September 2016 the Supreme Court ordered Karnataka to release 15,000 cusecs a day for 10 days Onmanorama.
A coalition of pro-Kannada groups, the Kannada Okkoota, called a statewide bandh for 9 September from 6 am to 6 pm. Its leader Vatal Nagaraj said "The Supreme Court's verdict is blind" The News Minute.
On bandh day, schools, colleges and firms including Infosys and Wipro closed and the Bengaluru Metro did not run. In Mandya, protesting farmers vandalised a PWD office, and in some areas protesters attacked theatres showing Tamil films Newslaundry.
The same day, Chief Minister Siddaramaiah wrote to Prime Minister Narendra Modi asking him to convene a meeting of the two chief ministers The Quint.
The 12 September order
Karnataka asked the court to cut the release to 1,000 cusecs, saying the state faced "huge public pressure", that agitation was costing it Rs 500 crore a day, and that security agencies warned the situation "may go out of hand" if the flow continued The Quint (PTI).
On Monday 12 September a bench of Justices Dipak Misra and U.U. Lalit reduced the daily quantity to 12,000 cusecs but extended the period to 20 September. It refused to keep the order in abeyance The Quint (PTI). Because the period was longer, the total release went up Onmanorama.
Timeline of the violence
Attacks on both sides of the border
A video of members of Yuva Karnataka assaulting a Tamil engineering student in Bengaluru over Facebook posts mocking Kannada actors went viral Newslaundry. In the early hours of 12 September the New Woodlands Hotel in Mylapore, Chennai, owned by a Kannadiga, was attacked. Staff told The New Indian Express six petrol bombs were thrown; police said only stones were. Four attackers were detained The Quint.
Attacks spread in Bengaluru
A Tamil Nadu-registered truck was set on fire near the Attibele toll gate. A group of about 20 protesters attacked a Tamil-owned mobile shop in Indiranagar and an Adyar Anand Bhavan outlet was vandalised. In Rameswaram, at least five Karnataka-registered vans were attacked and police arrested eight people The News Minute.
Section 144 imposed
Bengaluru police imposed prohibitory orders at 5 pm and deployed 15,000 personnel The News Minute. Protesters threw stones at the Chief Minister's residence in Mysuru The Quint.
KPN depot set on fire
Buses of KPN Travels, owned by K. Natarajan of Salem, were torched at the company's depot at Nayandahalli in Byatarayanapura police limits The News Minute. Counts differ: a driver's complaint said 42 buses Deccan Herald, The News Minute reported 45 of 52 The News Minute, Deccan Chronicle said 40, and the depot manager said 56 vehicles The Quint.
Police firing at Hegganahalli
Police opened fire when a mob tried to attack a patrol vehicle at Hegganahalli in Rajagopal Nagar PTI via Business Standard. A police official said caning and tear gas failed to stop a mob of about 50, and a KSRP platoon fired 12 rounds. Umesh, 25, from Kunigal in Tumakuru district, was killed; police said a preliminary inquiry found he worked at a petrol outlet and "was unfortunately present at the spot" IANS via Business Standard.
Curfew
Curfew was first imposed in seven police limits The Quint. It was then extended to 16 police station limits Business Standard. A 29-year-old man died after falling from the third floor of a building while escaping a lathicharge The Wire (PTI).
Curfew lifted
Curfew was lifted in all 16 police station limits, but the city-wide Section 144 order stayed in force. According to IANS, 78 vehicles including trucks and buses had been burnt across the city The News Minute (IANS).
Tamil Nadu bandh
A dawn-to-dusk bandh called by farmers' and traders' associations passed off peacefully. DMK leader M.K. Stalin was detained while trying to stop trains at Egmore, and Kanimozhi while blocking Anna Salai The Quint (PTI).
Both accounts
Karnataka protesters' and politicians' account
Pro-Kannada groups and farmers said the basin's reservoirs did not hold enough water even for drinking, and that ordering releases in a deficit year was unjust. Vatal Nagaraj called the 5 September ruling "blind" The News Minute. No organisation claimed responsibility for the arson. Police Commissioner N.S. Megharikh said none of the outfits had come forward to support any of the arrested accused Deccan Chronicle.
Police and Karnataka government account
Home Minister G. Parameshwara said: "We expected that if the decision goes against us, there will be some protest, but definitely not to this extent." He described "hit and run" attacks by small groups The Wire. Megharikh said the accused included rowdies and criminals. Deccan Chronicle reported that the violence was reportedly triggered by videos of the Chennai hotel attack Deccan Chronicle.
What the governments said
Karnataka's position Siddaramaiah said "The Cauvery issue caused injustice every time. It has hurt every Kannadiga," but condemned the attacks on Tamils and on Kannadigas in Tamil Nadu and promised strict action. In a letter to J. Jayalalithaa on 12 September he said Tamil Nadu channels had blown the assault on the student "out of proportion", and asked her to protect Kannada speakers The News Minute. The government decided to comply with the modified order and warned that violence would be dealt with an "iron-hand" DT Next.
Tamil Nadu's position Jayalalithaa replied that incidents in Tamil Nadu were "minor" and that "Absolute restraint has been observed in Tamil Nadu by all sections." She wrote that "more than 40 buses, 45 lorries" with Tamil Nadu plates had been burnt or damaged in Karnataka, calling it "an alarming situation" The News Minute. During the 16 September bandh, which her AIADMK did not back, Tamil Nadu police guarded Karnataka-linked businesses and Kannada-speaking areas Onmanorama.
The Centre Union Home Minister Rajnath Singh spoke to both chief ministers and offered full assistance; central forces were deployed in Bengaluru The Quint. On 13 September Prime Minister Modi said in a statement:
Violence cannot provide a solution to any problem. In a democracy, solutions are found through restraint and mutual dialogue.
Prime Minister Narendra Modi, statement, 13 September 2016 (PTI via Onmanorama)
He said he was "personally pained" and asked people of both states "to display sensitivity" Onmanorama (PTI).
Retaliation and the Tamil Nadu bandh
Besides the Chennai hotel and Rameswaram attacks, Liberation Panthers cadres blocked a Karnataka bus at Ambur The News Minute.
The 16 September bandh protested "violence targeting Tamils in Karnataka" and sought Cauvery water. The DMK, Tamil Nadu Congress, DMDK, MDMK, PMK and Left parties supported it, and over 15,000 police were on duty in Chennai Onmanorama. A Naam Tamilar Katchi worker who set himself on fire over the issue on 15 September died of his injuries The Quint (PTI).
The Cauvery Management Board question
The court on 20 September ordered 6,000 cusecs a day until 27 September Onmanorama. On 23 September the Karnataka legislature, in a special session, unanimously resolved that reservoir water would be used only for drinking within the state Onmanorama.
On 30 September the court ordered 6,000 cusecs for 1 to 6 October and directed the Centre to constitute a Cauvery Water Management Board. On 3 October the Assembly passed a fresh resolution allowing release to Tamil Nadu The Tribune.
The same day, Attorney General Mukul Rohatgi told the court that the board was only a tribunal "recommendation" and said he had made a mistake in committing to set it up by 4 October The News Minute. He cited Article 262 of the Constitution. On 4 October the court put the board on hold. Tamil Nadu's counsel Shekhar Naphade said: "There is something more than what meets the eye" The Wire.
The February 2018 verdict
On 16 February 2018 a bench headed by Chief Justice Dipak Misra partly allowed Karnataka's appeal. Tamil Nadu's share of water from Karnataka was cut from 192 to 177.25 tmc ft, and Karnataka's allocation rose by 14.75 tmc ft to 284.75 tmc ft, including 4.75 tmc ft more for Bengaluru. The order was to hold for 15 years The News Minute LiveLaw.
The Centre then said it could not frame the scheme during the Karnataka Assembly elections. The court accepted its draft on 18 May 2018, and the Cauvery Water Management Authority was notified on 1 June 2018 Oman Observer Scroll.
Outcome
- Deaths: Two in Bengaluru, one in police firing and one in a fall while escaping a lathicharge.
- Arrests: 1,045 people in 216 cases by 26 September Deccan Chronicle. Seven local men were arrested for the KPN depot arson Deccan Herald.
- Property: KPN estimated losses at Rs 12 to 14 crore Deccan Herald.
- Economic cost: Claim · ASSOCHAM Rs 22,000 to 25,000 crore lost to Karnataka, mainly Bengaluru. This is an industry estimate Onmanorama.
Where things stand now
The dispute flared again with bandhs in 2023. On 22 May 2026 the Karnataka Cabinet approved withdrawing 52 criminal cases, including cases related to Cauvery protests and about 10 cases against Vatal Nagaraj. The News Minute. Reports reviewed here do not say which, if any, of the 2016 Bengaluru arson cases were among them, and no trial outcome in the KPN case was found.
Questions people ask
Why did violence break out in Bengaluru on 12 September 2016?
The Supreme Court that day modified its Cauvery order, asking Karnataka to release 12,000 cusecs a day to Tamil Nadu until 20 September. Anger was also fed by videos of an attack on a Kannadiga-owned hotel in Chennai and the assault on a Tamil student in Bengaluru, according to news reports.
How many people died in the 2016 Cauvery violence in Bengaluru?
Two. A 25-year-old man was killed in police firing at Hegganahalli, and a 29-year-old died after falling from a building while fleeing a lathicharge.
Sources
- The News Minute: Karnataka bandh on September 9 as tempers build over Cauvery, Sept 2016
- Newslaundry: Cauvery water sparks bandh across Karnataka, 9 Sept 2016
- The Quint (PTI): SC now asks Karnataka to give TN 12,000 cusecs, 12 Sept 2016
- The News Minute: Tempers flare over Cauvery, as attacks increase so do appeals for peace, 12 Sept 2016
- The Quint: Cauvery dispute kills one; curfew imposed in 7 areas in Bengaluru, 12-13 Sept 2016
- The News Minute: Cauvery crisis: 45 KPN Travels buses set on fire in Bengaluru, 12 Sept 2016
- PTI via Business Standard: Cauvery row: violence erupts in B'luru, 1 killed in firing, 12 Sept 2016
- Business Standard: Cauvery water row: violence erupts in Bengaluru, night curfew in 16 police station limits, 13 Sept 2016
- IANS via Business Standard: Uneasy calm in Bengaluru over Cauvery water share, 13 Sept 2016
- The Wire: Two dead as violence continues in Bengaluru, 13 Sept 2016
- The News Minute: What Siddaramaiah and Jayalalithaa said in their letters to each other, 13 Sept 2016
- Onmanorama (PTI): Pained over Cauvery dispute, PM Modi appeals for peace, 13 Sept 2016
- DT Next: Bengaluru limps back to normalcy, Sept 2016
- The News Minute (IANS): City returns to normalcy, Bengaluru police lift curfew, 14 Sept 2016
- The Quint: Bengaluru police lift curfew, Sec 144 still imposed, 14 Sept 2016
- Onmanorama: Cauvery dispute causes Rs 25,000 cr loss to Karnataka: Assocham, Sept 2016
- The News Minute: Bengaluru police make arrests in KPN buses arson case, Sept 2016
- Deccan Herald: Seven locals arrested for torching buses at KPN Travels depot, 15 Sept 2016
- Onmanorama: Cauvery row: Bandh in Tamil Nadu; Stalin and Kanimozhi court arrest, 16 Sept 2016
- The Quint (PTI): TN bandh over Cauvery issue ends peacefully, DMK's Stalin arrested, 16 Sept 2016
- Onmanorama: Karnataka decides not to release Cauvery water to TN, 23 Sept 2016
- Deccan Chronicle: Over 1,000 arrested for Cauvery riots on September 12, 27 Sept 2016
- The Tribune: Release water to TN, Karnataka Assembly tells state govt, 3 Oct 2016
- The News Minute: SC has no authority to ask us to set up Cauvery board, says Centre, 3 Oct 2016
- The Wire: Supreme Court relents on Cauvery Management Board, 4 Oct 2016
- The News Minute: Cauvery verdict: TN's allocation reduced, Karnataka gets 14.75 tmc more, 16 Feb 2018
- LiveLaw: Cauvery: SC directs Karnataka to release 177.25 TMC of water to Tamil Nadu, 16 Feb 2018
- Oman Observer: Centre notifies Cauvery Water Management Authority, 1 June 2018
- Scroll: AIADMK urges Centre to take control of Cauvery Water Management Board, 21 June 2019
- Newslaundry: Cauvery violence: mayhem in Bengaluru, attacks on Kannadigas and Tamils, 12 Sept 2016
- The News Minute: Karnataka Cabinet withdraws 52 criminal cases, BJP alleges appeasement politics, 22 May 2026