Immigration and Customs Enforcement has already begun arresting illegal immigrants from coast to coast in the first few days of President Donald Trump's administration.

Trump’s “border czar” Tom Homan, a former acting ICE director, said in an appearance on Fox News that agents were arresting people in sanctuary cities, where local officials refuse to allow agents to arrest immigrants in their jails after police have picked them up for alleged crimes.

The Trump administration announced Friday that it is expanding a fast-track deportation authority nationwide, allowing immigration officers to deport migrants without appearing before a judge.

An immigration group sued on Wednesday to block President Donald Trump's move to expand fast-track deportations under his pledge to remove millions of people who are in the country illegally. People facing fast-track deportations do not have access to an attorney and are unable to present evidence against their removal from the U.

ACLU sues to stop Trump policy that allows immediate deportation of some immigrants. The new policy could pave the way for mass expulsions.