under surveillance
Keep him under surveillance.
Tout le personnel sensible est sous surveillance.
All sensitive personnel are under surveillance.
— Ghost in the Shell (1995)
C'est gentil, mais cette pièce est sous surveillance.
That's nice, but this room is under surveillance.
Les portables dans cette zone sont sous surveillance.
Mobile phones in this area are being monitored.
— Infernal Affairs (2002)
Park Hyun-kyu est bien sous surveillance ?
Is Park Hyun-kyu under surveillance?
— Memories of Murder (2003)
Tom est sous surveillance.
Tom is under surveillance.