A Bolivian presidential campaign launch ended in violence when rival football fans began fighting and hurling chairs at each other.
Dozens of plastic chairs were thrown as insults turned to blows at the Democratic Unity party event in Gilberto Menacho Stadium, Santa Cruz.
Police arrived and shut down the event.
There was no information on injuries or arrests.
Democratic Unity candidate Samuel Medina blamed rival party Movement Toward Socialism (MAS), headed by President Evo Morales, for inciting the violence.
Bolivians head to the polls on October 12 with Morales the clear front-runner.