The obscurity surrounding the facility, in the context of the local border regime, is extremely worrying. Many NGOs and journalists have documented widespread pushback practices (Arsis et al., 2018; Greek Council for Refugees, 2018; Koçulu, 2019), evidenced through migrant testimonies (Mobile Info Team 2019) and, more recently, videos (Forensic Architecture, 2019a; 2019b). Despite denials by the Hellenic Police and the Greek government, European and international international human rights bodies (Council of Europe, 2019; Committee Against torture 2019) have accepted these testimonies as credible. We have no firm evidence that the Poros facility may be one of the many ‘informal’ detention places migrant testimonies implicated in pushbacks. Yet, the centre is located no further than two kilometres from the Greek-Turkish border, and the layout of the area is similar to the location of a pushback captured on camera and analysed by Forensic Architecture (2019a): near a dirt road with direct access to the Evros River. Black cars and white vans (images 5 and 6), without police insignia and some without number plates, such as those in the Poros centre, have been mentioned in testimonies of pushbacks (Arsis et al., 2018). Objects looking like inflatable boats are visible in our video stills. While there might be other explanations for their presence (used for patrolling the river or confiscated from migrants crossing the river) they are also used during pushbacks operations, and their presence in a detention centre seems odd. These uncertainties, and the tendency of security bodies to avoid revealing information on spaces of detention, are not unusual. However, the obscurity surrounding the Poros centre, located in an area of the European border where detention have long attracted criticism and there is considerable evidence of illegal and violent border control practices, should be a concern for all. References Alexandroupoli Online, 2011. Manolis Othonas visits Evros regarding migration. Online: alexpolisonline.com. Alexandroupoli Police Directorate, 2011. Submission of Offers for the contracting of services for the renovation and maintenance services of the centre of the Feres Border Guard Department of the Alexandroupoli Police directorate in Poros, budgeted expense of € 11.053,67, including VAT 23%. Online: astynomia.gr. Arsis, Greek Council for Refugees, HumanRights360, 2018. The new normality: Continuous push-backs of third country nationals on the Evros river. Online: humanrights360.org. CloseTheCamps, 2012. Camp: Poros (First reception centre of Evros). Online: closethecamps.org. 9