detention centre
noun /dɪˈtenʃn sentə(r)/
  /dɪˈtenʃn sentər/
 (British English) (US English detention center)
- a place where people who have entered a country without the necessary documents can be kept in detention for a short period of time- They are confined in a detention centre for asylum seekers, and forced to prove their refugee status.
 
- a prison for people who have been accused of a crime and are waiting for their trial or (in the UK in the past) for young people who have been found guilty of a crime