A hidden camera was allegedly found in a shower stall at the University of Alberta Hospital’s Pulse Generator gym, according to a notice written to gym members.

The notice said that Edmonton police have arrested the person who allegedly placed the camera in the shower stall.

Police determined that seven men were filmed on camera between November 27 after 5 p.m. and November 28 at approximately 9 a.m.

No other cameras were found inside the gym, and police believe this was an isolated incident.