It's not possible to keep somebody in detention for deportation if there is not a clear perspective of when the person can be deported from the country. If there is no idea about the nationality of the person, there might be difficulties in putting him in detention.
What you can do in order to check the nationality is try to analyze the spoken language. You can try to check documents that he has with him. You can try to present him to embassies of other states that you think could be the person's state of origin, and you have to go to...[Technical difficulty—Editor]