Bolivia's former leader Evo Morales has started a week-long march towards La Paz to protest against the current president, his one-time ally Luis Arce.
They indicate that President Evo Morales is facing a run-off vote in December after failing to win an outright majority. Katy Watson reports from La Paz.
Bolivia said some diplomats have already presented their official versions for the incident, which has caused anger in Bolivia. Outside the US embassy in La Paz, hundreds of protesters demanded its closure.