Two people died during Jallikattu event in Tamil Nadu's Puddukottai on Sunday.
A Ram and Sathish Kumar, both 35, were gored by bulls while watching the sport and died of injuries.
Chief Minister E Palaniswami, who flagged off the event at Viralimalai, said, "We've followed all safety norms as per the Supreme Court directions. For the first time, spectators too have been insured besides bull-tamers."
In 2014, the Supreme Court banned Jallikattu citing cruelty to bulls and safety issues for spectators. Some 200 people have died in these events over the last two decades.
However, the Tamil Nadu government in 2017 paved the way for lifting the ban by adopting an ordinance following massive protests.
(With inputs from agencies)