There is a detention centre for people who “threaten the constitutional state” (“Gefährder”) in Berlin-Lichtenrade. This prison started working on September 22nd,2018 with place for 12 persons.
Berlin has its own law regarding custody pending deportation (“Abschiebegewahrsamsordnung”).
Address of the prison:
Kirchhainer Damm 64-66
(last update: 06/2018)