The latest news and top stories on ICE (US Immigration and Customs Enforcement.) A prominent US federal law enforcement agency, ICE is headquartered in Washington DC, with over 400 global offices. Operating under the Department of Homeland Security, its primary mission is to protect the United States from transnational crime and illegal immigration, safeguarding national security and public safety. ICE’s main activities include enforcing immigration laws, detaining and removing unauthorised immigrants and investigating transnational criminal organisations, human trafficking and financial crimes. Formed in 2003 post-9/11, it is the largest investigative agency within DHS.