Oh I see. Even in the UK they do not close down an entire block to carry out mass searches.Marco wrote: To answer your question, there is a special law that they can stop/search in the center of Amsterdam (and perhaps other cities) without any probable cause. In other words, they can close down a block and search everyone. This is what they are extend to the NW.
They can search you but I believe they need suspicion (although any reason can be made up so it's a moot point really). You can also ask for a note that explains why you've been searched and other details etc.