Fifteen people were arrested Tuesday after 150 protesters gathered in Center City to rally against the Trump administration's ICE operations in.

One witness said a Philadelphia police officer hit a protester “wherever he could” despite the protester not offering any resistance.

Immigration and Customs Enforcement (ICE) is preparing to deploy tactical units to Philadelphia and multiple other Democrat-run cities, according to CBS News. The move comes amid heightened anxiety among the city’s immigrant communities and an uptick in immigration enforcement in the area. Here’s what we know so far.

Philadelphia is among five Democratic-led cities where President Trump is preparing to send ICE tactical teams ahead of nationwide protests.

This group, organized by SEIU Local 32BJ, is calling for the release of SEIU California President David Huerta, who was detained during protests.

Immigration raids have impacted the Philadelphia area, including in Norristown, where at least 20 people have been detained in raids.

Two Philadelphia police officers suffered minor injuries and 15 protesters were arrested after a physical confrontation erupted Tuesday evening in Center City during a march denouncing deportations, police said.

Protesters gathered Thursday night on East Third Street in Bethlehem, a day after Immigration and Customs Enforcement arrested 17 construction workers at the Five 10 Flats apartment complex.

The demonstrations come on the heels of protests flaring up around the country over federal immigration enforcement raids that began last week and Trump ordering National Guard troops and Marines to Los Angeles where protesters blocked a freeway and set cars on fire.