A series of visits to homes on Wednesday by officers with Immigration and Customs Enforcement (ICE) has put intense fear into immigrants in Kingston, whether documented or undocumented.

According to organizers with immigrant advocacy group Nobody Leaves Mid-Hudson, at least three incidents led to one man detained and another forced into hiding.

NLMH Ulster County Organizer Diana Lopez said on Thursday that several local immigrants chose not to go to work, and a handful of others kept their children home from school, for fear that plainclothes ICE officers may approach them or their children outside.

In one case, she said a man opened his door to ICE officers looking for his brother, who was not home at the time, but the officer still took fingerprints from the man who answered the door.

NLMH is telling immigrants they do not have to comply with any requests made by an ICE officer unless the officer has a judicial warrant, signed by a judge.

Lopez shared part of a "call-in letter" presented by ICE agents to one of the people they had contact with on Wednesday. The document was signed by an ICE officer and did not detail any specifics for why ICE visited the person's home.

Lopez is urging NLMH clients to become familiar with the differences between administrative ICE documents and actual judicial warrants. She is also urging them to be skeptical overall and not to open their doors for surprise guests who they do not know.

"If they say, 'We're looking for this person' or 'We have a warrant,' you can just be like, 'Okay, let me see it,'" Lopez said, "but either pass it through the window or under the door. Do not open the door."

ICE has not yet responded to Spectrum News' requests for comment on this story.