There are more questions than answers after federal immigration agents deployed pepper spray and other chemical agents after a crash and confrontation with Elgin, Illinois, residents over the weekend.

Elgin city leaders are among those demanding answers after an Immigration and Customs Enforcement operation turned into a chaotic scene involving a crash, a crowd and chemical irritants.

The incident began around 9 a.m. Saturday when Elgin police said ICE agents were involved in a car crash. Another person also involved in the crash ran off toward a nearby apartment complex on Maple Lane.

Within minutes o the crash, dozens of people gathered to monitor the agents' activity. Tensions escalated quickly and police said the agents used pepper spray and other chemical agents to push the crowd back.

Elgin police said seven people were treated at the scene for exposure to those chemical agents.

It's still not known how many people were detained during the operation on Saturday, and it's also not known why agents where in the area at all.

The U.S. Department of Homeland Security released a statement Monday saying they detained one man who is suspected of being a Venezuelan gang member Saturday. In the statement, DHS claims the man, who they said had Temporary Protected Status which was only revoked it last month, intentionally rammed ICE agents' car into a tree then fled to a home of an alleged stranger. DHS said he was taken into custody "after several hours of negotiating."

The agents were not injured in the crash, DHS said.