under arrest
They are under arrest.
Wo würde der Bootsmann jemanden unter Arrest bringen?
Where would the boatswain put someone under arrest?
— Titanic (1997)
Und sie haben Kim Young-sam unter Arrest gestellt.
And they placed Kim Young-sam under house arrest.
— A Taxi Driver (2017)
I am placing you under arrest.
— The Wolf's Call - Entscheidung in der Tiefe (2019)