Bystanders and protesters have been confronting ICE agents as the Trump administration ramps up immigration enforcement.

People noticed the patches during a law enforcement operation in Minneapolis on Tuesday. The imagery raised questions for some people.

During the raid, uniforms identified the agents as FBI, ICE and ATF. But many of them wouldn't let their true identity be shown, as they covered their faces with mask. It's a common sight across the country as the Department of Homeland Security cracks down on illegal immigration.

Political controversy has followed the recent practice of federal agents concealing their identities on duty. Law enforcement agencies say there are good reasons for it.

Minneapolis City Council members voted to let the city auditor review ICE's involvement in what authorities say was a criminal investigation – not an immigration enforcement raid – along Lake Street at Bloomington Avenue this week.

A federal raid in Minneapolis has led to more questions than answers and days of back and forth between law enforcement and elected officials.

While officials roundly assailed Tuesday’s militarized raid, the reaction has exposed familiar political fault lines on the left.

Minneapolis Mayor Jacob Frey and local law enforcement heads said misinformation made a tense situation worse when armored federal agents raided a south Minneapolis restaurant on Tuesday.