The so-called 'CITGO 6' - Jorge Toledo, Tomeu Vadell, José Pereira and the brothers José Luis and Alirio José Zambrano - have been detained for more than 18 months in the basement of the Venezuelan military counterintelligence headquarters (DGCIM) in Caracas. But after reports of a disturbance by detainees at the facility in recent weeks, families have not been allowed .