Federal immigration agents tackled and arrested a Somali American man in Minneapolis on Tuesday and detained him for about two hours for no apparent reason other than his ethnicity.

Mubashir, who moved to the United States as a small boy and became a naturalized American citizen, said that he stepped onto a sidewalk near 4th Street and Cedar Avenue during his lunch break when two masked men approached him. The Cedar-Riverside neighborhood is the heart of the city’s Somali American community.