CITY OF GRONINGEN, 6 NOVEMBER 2013:

Police break into 30 student houses. Just to show the students that they can. ''Anti-burglary exercise'', the PD explains. It turned out they put in an extra effort: officers did a little snooping around inside the student dorms and ''found valuable things like laptops and tablets''.

When they were finished, the cops left behind a Polaroid of themselves posing in the room, as a token of their visit.