According the Court's Press Release 

The case of Ilias and Ahmed v. Hungary (application no. 47287/15) concerned the border-zone detention for 23 days of two Bangladeshi asylum-seekers as well as their removal from Hungary to Serbia.

In the Chamber judgment, the European Court of Human Rights held, unanimously, that there had been: a violation of Article 5 §§ 1 and 4 (right to liberty and security) of the European Convention on Human Rights because the applicants’ confinement in the Röszke border-zone had amounted to detention, meaning they had effectively been deprived of their liberty without any formal, reasoned decision and without appropriate judicial review; no violation of Article 3 (prohibition of inhuman or degrading treatment) as concerned the conditions of their detention in the transit zone, but a violation of Article 13 (right to an effective remedy) as concerned the lack of an effective remedy with which they could have complained about their conditions of detention; and, a violation of Article 3 on account of the applicants’ expulsion to Serbia insofar as they had not had the benefit of effective guarantees to protect them from exposure to a real risk of being subjected to inhuman or degrading treatment

The case was referred to the Grand Chamber. Read more here.