-6the CPT operates to address the situation of the 93 persons being held in the two cells in the port of Samos in an expeditious and transparent manner once the delegation had communicated its grave concerns over their conditions of detention (see paragraphs 26 and 27 below). A further manifestation of that failure was that, despite several detailed requests, the CPT’s delegation was not informed of the whereabouts of the vessel detaining some 400 migrants after it set sail from Lesbos on the night of 14-15 March 2020 (i.e. on the day after the CPT’s visit began). The delegation subsequently located the persons concerned, without the assistance of the Greek authorities, on the day that they were disembarked on the mainland. The CPT recommends that the Greek authorities review the liaison officer arrangements to ensure that issues raised by a CPT delegation are addressed in a timely manner by the competent ministry or service. The CPT also wishes to recall that its delegations are entitled to “full information on the places where persons deprived of their liberty are being held” (cf. Article 8, 2 (b) of the Convention), irrespective of the nature of that place of detention. E. Immediate observations under Article 8, paragraph 5, of the Convention 10. In the course of the visit, the CPT’s delegation made a number of requests to the Greek authorities in respect of matters requiring urgent attention. These requests, including the three formal immediate observations under Article 8, paragraph 5, of the Convention, were confirmed in the written preliminary observations transmitted on 23 March 2020. The Greek authorities were requested: - - - to take out of use the two cells at Isaakio Police and Border Guard Station until such time as they have been properly refurbished; to confirm that every person who is held at Poros detention facility is now properly registered, with their full details recorded, including the time of their entry and exit from the facility; to confirm that all the persons admitted to the Malakasa camp have now undergone a full health screening, given the significant public health issues at stake; to transfer immediately the persons held in the two cells under the authority of the Hellenic Police at the former Special Missions Unit of the Hellenic Coastguard in Samos to alternative premises that offer humane and decent conditions; to act to ensure that the practice of pushbacks of migrants into Turkey across the Evros River ceases immediately. By letter of 16 April 2020, the Ministry of Migration Policy and the Hellenic Police provided a response to the delegation’s preliminary observations, including as regards the action taken to address the above-mentioned requests. This information has been taken into account when drafting the report.