the headquarters for the bolivarian intelligence service (sebin) in plaza venezuela, caracas, have an underground detention facility that has been dubbed "la tumba" (the tomb). the facility is located where the underground parking for the metro caracas were to be located. the cells are two by three meters that have a cement bed, white walls, security cameras, no windows and barred doors, with each cell aligned next to one another so there are no interactions between prisoners. such conditions have caused prisoners to become very ill, though they are denied medical treatment. bright lights in the cells are kept on so prisoners lose their sense of time, with the only sounds heard being from the nearby caracas metro trains. those who visit the prisoners are subjected to strip searches by multiple sebin personnel.