Federal authorities are investigating after envelopes containing an unidentified white powder were found at a government building in New York City that houses an Immigration and Customs Enforcement office, officials said Thursday.

Hazmat teams have been deployed to a federal government building in New York City after envelopes containing a mysterious white powder were discovered, authorities said. At such a critical moment in US history, we need reporters on the ground. Your donation allows us to keep sending journalists to speak to both sides of the story.