The incident unfolded Saturday in Chicago’s Old Irving Park neighborhood, where residents say federal agents disrupted a children’s Halloween parade

Shocking video shows a chaotic scene on a quiet Chicago street as Border Patrol agents in tactical gear drag a 67-year-old man from his car while children in Halloween costumes look on in horror.

According to his running club, the man, who is a U.S. citizen, was returning from a team run when agents pulled him out of his vehicle, tackled him to the ground and kneeled on top of him, allegedly breaking six ribs and causing internal bleeding.

The incident unfolded Saturday in the city’s Old Irving Park neighborhood, where residents say the agents disrupted a children’s Halloween parade amid an immigration enforcement operation.