To counter the problem, Homan said that ICE was forced to allocate more resources and conduct large-scale operations, like the one this week, in those communities.
Immigrants who are covered by the Deferred Action for Childhood Arrivals program were not targeted, according to ICE. Los Angeles saw 101 people arrested, while 107 were arrested in Philadelphia.
The agency, known as ICE, announced Thursday that more than 450 people had been arrested around the country this week, including 28 in Maryland and 14 in Washington, D.C.
"As I've stated many times", Philadelphia Mayor Kenney said Friday, "when our immigrant communities can not trust law enforcement, they are less likely to want to work with them to fight crime".
"Laws created under the guise to protect immigrants who are here to better their lives are being used by criminal elements to protect themselves", said Jorge Field, assistant field office director for ICE in Los Angeles, adding that "having to make these arrests in public puts more people in danger".
Philadelphia officials don't like the term "Sanctuary City", saying they merely enforce policies and laws while treating undocumented and documented residents alike within the criminal justice system.
Immigration arrests jumped almost 40 percent in the first three months of the Trump administration.
Denver has made it clear that ICE needs to obtain a criminal warrant before an immigration detainer is granted (doing otherwise has been ruled unconstitutional), and that it does honor notification of release requests from ICE.
He said ICE wants cooperative, respectful relationships with law-enforcement partners "to help prevent unsafe criminal aliens from being released back onto the streets" and "non-cooperation policies severely undermine that effort". Individuals with active DACA were not targeted for arrest.
A federal operation this week to arrest hundreds of people who were in the United States illegally specifically targeted sanctuary cities around the country.
In a response, the Acting Director of ICE has stated how they would continue the arrests in areas which hide and shield illegal and criminal immigrants from deportation. Anyone with an outstanding order of removal is subject to immediate deportation.
"Public safety is about all of us being safe from the hands of Trump's criminalization machine and can not be defined by ICE agents who knock down the doors of our homes with guns and drag people out in front of their children", Almiron said in a statement.