Indians protesting a ban on a traditional form of bullfighting clashed with police and torched vehicles in the southern city of Chennai on Monday.
The sport, known as Jallikattu, which is popular in the southern Tamil Nadu state, was banned by India's Supreme Court in 2014 on grounds of animal cruelty.
Jallikattu events were held in the state on Sunday after the government passed an executive order temporarily lifting the prohibition.
The protesters, who began gathering last week at Chennai's Marina Beach, are calling for the ban to permanently repealed and say they will not leave until their demand is met.
As the police tried to break up the crowd on Monday, protesters began hurling stones and bricks at police and setting vehicles on fire, according to media reports.
Television images showed police officers using tear-gas and batons on the crowds.
"We have removed 3,000 of the 5,000 protesters gathered here since last week. The remaining will also leave soon. The situation is normal now," a local police officer, Kumar, said by phone from Chennai.
Indian media reported that 20 people and 12 policemen were injured in the clashes. Protests also took place in other parts of the state, including the city of Madurai, where 82 people were detained by police.
Animal rights activists have long opposed the activity, pointing to the injuries it causes to bulls as well as human deaths. Supporters say the sport is part of local tradition and heritage and deny it is cruel to animals.
Proponents of the sport have appealed for a permanent lifting of the ban, arguing the executive order will last only six months and can be challenged in the court, where it is likely to be struck down.
Two men were gored to death and up to 90 more people were injured in a Jallikattu event in Pudukottai district on Sunday amid the ongoing debate and protests about the future of the sport.
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