Six suspects in murder of Ecuador presidential candidate killed in prison, authorities say

The six Colombians had been arrested on the day Fernando Villavicencio was shot dead in August

Six men suspected of involvement in the August murder of Ecuador's anti-corruption presidential candidate Fernando Villavicencio have been killed in prison, the prisons agency has said, barely a week before a crucial run-off election.

The killings took place on Friday in a penitentiary in Guayaquil, the South American country's largest city, the attorney general's office announced earlier.