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Nicaraguan presidential challenger Cristiana Chamorro was placed under house arrest in early June.
By Mario Medrano, Tatiana Arias and Samantha Beech, CNN
Four months ahead of a crucial election, the government of long-time President Daniel Ortega has detained more than two dozen people since late May, including the six presidential candidates. Opposition leaders, student leaders, businessmen and activists have also been targeted.
Those latest detained include presidential candidate Medardo Mairena Sequeira and farming and labor leaders Freddy Navas Lopez, Pablo Morales and Pedro Joaquin Mena Amador. They are accused of being the ringleaders in the murder of four policemen and the kidnapping of 12 police officers in 2018, according to a statement from the Nicaraguan National police published early Tuesday.