Madison East High School students from Wisconsin found spying cameras in their rooms at a Minneapolis hotel, prompting a police investigation. The students were attending a conference sponsored by the school at the Hyatt Regency hotel in Minneapolis. The recording devices were not found in other rooms on the property, the hotel management determined after a careful search. No arrests have been made but some reports say that the authorities searched a home in Cottage Grove, Wisconsin, on Thursday morning, as part of the investigation. A staff member accompanying students on the trip was placed on leave as a precautionary measure.
Source: https://www.bleepingcomputer.com/news/security/high-school-students-find-spy-cams-in-their-hotel-rooms/