Again, I won't speak to these police stations specifically.
From my experience in the national security environment, information like this can come in through various channels. It could come through the service. It could come through police channels. It could come through foreign intelligence partners or police partners. There's no one route into the government when something like this becomes known, but once it is known by one agency, it's very quickly shared amongst the community so that we can talk about it and talk about the best approach to managing it.