Mayor Ras Baraka said he was "appalled" and "angry" and blasted ICE for also detaining U.S. citizens, including a veteran. ICE said citizens may be questioned during an investigation.

After a raid at a business in Newark, reportedly without a warrant, here's what to know about ICE and immigration enforcement in America.

U.S. immigration agents rounded up undocumented migrants as well as American citizens in a raid of a Newark, New Jersey, worksite on Thursday that the city's mayor said involved detaining a military veteran and violations of the people's rights. Alex Cohen produced this report.

The raid in Newark, New Jersey, came after President Donald Trump signed a series of executive orders on his first day in office cracking down on immigration and the U.S.-Mexico border.

U.S. immigration agents rounded up undocumented migrants as well as American citizens in a raid of a Newark, New Jersey, worksite on Thursday that the city's mayor said involved detaining a military veteran and violations of the people's rights.

Just three days into President Donald Trump’s promised mass deportation operation, Immigration and Customs Enforcement officers have already arrested a U.S. citizen who served in the military. About 10 or 12 ICE agents raided a Newark,

Newark Mayor Ras J. Baraka said in a statement on Thursday that ICE "raided" a business in the city and detained "undocumented residents, as well as citizens, without producing a warrant."