Mínimum criteria in deprivation of liberty Small window with horizontal bars at the Police Station of the CNP of San Blas district, Madrid 83. We have observed, at some of the facilities visited, the existence of ceramic appliances in the toilets, in respect of which we express our concern, since the detainees could break them to attempt to injure themselves or attach the officers. For this reason, the responsible authorities must proceed to have them replaced by others made of anti-vandalism materials. Porcelain toilet appliances at the Station of the GC of Ciudad Real 84. It is of particular importance for officers to be constantly present at the cells when detainees are kept at them, to prevent risks in a situation that requires the immediate assistance of the officers. Concern is expressed in this respect as we convey to the authorities since we know of certain cases of death of a detainee, which could possibly have been avoided and it is considered that all necessary measures should be adopted for such acts not to occur, without its being possible to allege lack of personnel, or that they have to cover other services. 53