Federal immigration agents chasing a suspect who ran off after being involved in a car crash near Chicago were targeted by protesters who pelted them with snowballs.

Video of the fracas shows dozens of demonstrators shouting at the masked agents on the snowy streets of Elgin, a Windy City suburb, with the feds responding by deploying tear gas to clear the mob.

The unruly protesters then start throwing icy snowballs at the agents.

The federal forces can be heard on the footage giving verbal warnings before lobbing their tear-gas canisters on nearby front lawns. The demonstrators quickly grab the devices and bury them in the snow to reduce their efficacy.

The clash began when federal agents called local police for assistance after they were involved in a traffic crash while conducting i

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