Authorities in three states have made arrests in connection with individuals impersonating Immigration and Customs Enforcement (ICE) officers, as tensions rise amid a nationwide immigration crackdown.

New Jersey's ICE director John Tsoukaris says arrests have increased with federal agencies working together to target those in the U.S. illegally.

On Monday, the Florida Highway Patrol conducted a joint operation with federal immigration officers in Jefferson County to round up 12 people believed to be in the country illegally, one of a number of raids performed around the country as the Trump administration ramps up its plans for mass deportation.

Some people caught in Trump administration immigration operations have already been released back into the United States on a monitoring program.

A county in New York City’s Long Island suburbs will be teaming up with federal authorities in President Donald Trump’s crackdown on immigrants who are in the U.S. illegally.

Most institutions already have protocols in place to respond to law enforcement. For some faculty and students, campus guidelines aren’t going far enough.

Oklahoma is moving to require proof of citizenship for the guardians of public school students, while California schools are distributing “know your rights” cards to immigrant families

Advocates told HuffPost the incidents show the dangerous environment immigrants are facing under President Donald Trump.

Men in South Carolina and North Carolina, as well as a Temple University student, are charged with impersonating law enforcement officers.