One of the suspicious white-powder envelopes sent to an ICE office in Manhattan this week included a menacing note saying it was delivering “karma” for migrants, law-enforcement sources told The Post.

The 41-floor office building is home to ICE's New York City field office, as well as the FBI's New York field office and an immigration court. It has made headlines and been the site of frequent protests over ICE operations in the city amid the Trump administration's crackdown on undocumented immigrants.

A suspicious white powder that forced the Immigration and Customs Enforcement field office in New York City to evacuate was non-hazardous, police sources say.Hazmat teams responded late Thursday afternoon to 26 Federal Plaza,