Reported by FranceInfo.
The incident took place at an exhibition park, which was hosting a country music festival, tattoo exhibit, and a poker tournament.
It is noted that the cause of the fight is unknown, and the possible killer has not yet been detained by the police.
The mayor of Tarba, Gerard Tremezhe, ordered an immediate end to the festival and demanded that its participants leave the event.
Earlier, football fans staged a fight with the police in London.