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

Newark Mayor Ras J. Baraka issued a statement late Thursday afternoon denouncing the raid as an “egregious act” conducted without a warrant and in violation of the Fourth Amendment of the U.S. Constitution, which guarantees “the right of the people be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures.”

Immigrants in Chicago and other U.S. cities have been preparing for immigration arrests since President-elect Donald Trump won the November election.

The Trump administration has not publicly said how many immigration detention beds it needs to achieve its goals, or what the cost will be.

Several districts cited recent guidelines issued by New York officials that outlined how schools should react to immigration visits.

School Districts Seek Student Protections from Immigration Enforcement School Transportation News Special Reports

President Donald Trump took office, Bridgeport school officials put out a guide for protecting undocumented students from immigration raids.