President Donald Trump’s promised crackdown on illegal immigration has begun to take shape in San Diego County, as federal agents launched targeted operations to arrest undocumented immigrants and a wave of military troops got to work reinforcing U.

Immigrant rights groups are urging anyone who feels unsafe to know their rights in case they are stopped by a federal enforcement official.

Agents from U.S. Immigrations and Customs Enforcement, the FBI and the Drug Enforcement Administration have taken part in immigration raids across San Diego as President Donald Trump’s promised deportation crackdown

U.S. Immigration and Customs Enforcement (ICE) appear to be stepping up operations in San Diego County, as migrant communities remain on edge over President Donald Trump's pledge to carry out mass deportations.

One by one, an ICE attorney asked Partida to move the detainees’ cases to courts closer to their new locations. All of the people who were transferred had attorneys in San Diego, including some through a county program that represents people in local immigration custody for free.

At the heart of the discussion was to what extent city police are legally able to assist immigration officials under Senate Bill 54, a California law that restricts the role local law enforcement can play in immigration enforcement but also has allowances for working with federal officers to address violent criminals.

Border czar Tom Homan told NBC News that several people with criminal convictions were apprehended in Chicago.

Immigration and Customs Enforcement agents appear to have stepped up their detention of unauthorized immigrants, taking more than 500 people into custody on Thursday, almost twice the average number of daily arrests late last year.

President Donald Trump has signed 10 executive orders on immigration and issued a slew of edicts to carry out promises of mass deportations and border security.

Federal agencies working in California pledged cooperation in immigration enforcement operations and posted photos of people being taken into custody.

The president has directed the U.S. military to reinforce the border, and the acting secretary of defense on Wednesday announced the Pentagon is sending around 1,500 active duty troops to the country’s southern border, joining 2,500 active duty personnel already there.

CHICAGO (AP) — Top Trump administration officials, including “border czar” Tom Homan and the acting deputy attorney general, visited Chicago on Sunday to witness the start of ramped-up immigration enforcement in the nation’s third-largest city.