Across the US, group chats and community threads have started spiking with warnings. Not just the typical alerts about traffic or out of service subway stations, but where and when an Immigration and Customs Enforcement (Ice) raid was last seen. What places to avoid. What the plainclothes agents might look like.

“Hey all,” a Brooklyn, New York, resident wrote in a closed chat with neighbors last week. “A little birdie just told me ICE is out.”

Another person quickly followed suit.

“The witness says they saw 3 people picked up by 2 agents with ICE on their vests,” they said, with details on where the location of the arrests occurred and what the undercover vehicles looked like. “If anyone sees any ICE agents or activity you can drop a description at this link for local rapid-response folks.”

These kinds of exchanges are commonplace now in in America. There have been Ice raids under previous administrations, but it’s notable that an American law enforcement agency has struck such a successful campaign of measurable, national fear.