President-elect Donald Trump's border czar said the incoming administration is now "reviewing" whether to launch removal operations in Chicago.

Federal immigration officers will target more than 300 people in the Chicago area with histories of violent crimes after President-elect Donald Trump takes office, an official said.

Immigration and Customs Enforcement officials are planning a major enforcement operation that will target immigrants for several days following the inauguration of Donald Trump as president, according to a document reviewed by NBC News and a person familiar with the planning.

Many immigrant advocacy groups in the city and suburbs have been reaching out to undocumented immigrants ahead of Trump's inauguration, in an effort to get ready for what might be coming.

Trump's incoming "border czar" Tim Homan told ABC News late Saturday that they are now "reviewing any plans in Chicago because of the leak," adding that news reports may have potentially put officer safety at risk.

Local leaders and immigrant rights groups in Chicago met Saturday morning in the Pilsen neighborhood to make sure the community is prepared.

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The size of the planned immigration raids is unclear, but they would be the opening step in the president-elect’s goal of overseeing the largest deportation program in history.

President-elect Donald Trump's incoming "border czar" Tom Homan said on Saturday that targeted operations to detain migrants who are in the U.S. illegally ..

Prospects of a raid in Chicago come just a few weeks after Trump's border czar Tom Homan visited the city and threatened to prosecute the mayor if he did not cooperate.

As part of President-elect Donald Trump's strategy to secure the border, Immigration and Customs Enforcement were expected to carry out post-inauguration raids as early as Tuesday, sources briefed on the plans told ABC News Saturday morning.