Ecuadorian authorities have announced the arrest of six Colombian nationals suspected of killing Fernando Villavicencio, a presidential candidate who was campaigning against drug cartels and corruption. Villavicencio, 59, was shot dead on Wednesday in Quito, less than two weeks before a special presidential election.
Villavicencio was not a front-runner, but his death shocked the nation and raised concerns about the security situation and the influence of drug trafficking in the country.