For days, Luis Ramirez had an uneasy feeling about the men dressed as utility workers he’d seen outside his family’s Mexican restaurant in suburban Minneapolis.

They wore high-visibility vests and spotless white hard hats, he noticed, even while parked in their vehicle. His search for the Wisconsin-based electrician advertised on the car’s doors returned no results.

On Tuesday, when their Nissan returned to the lot outside his restaurant, Ramirez, 31, filmed his confrontation with the two men, who hide their faces as he approaches and appear to be wearing heavy tactical gear beneath their yellow vests.

As the sweeping immigration crackdown in Minnesota continues, legal observers and officials say they have received a growing number of reports of federal agents impersonating construction workers, delivery drivers and in some cases anti-ICE activists.