The shooting took place in the 4500 Block of South Hermitage in the city's Back of the Yards neighborhood.
He is listed in critical condition right now.
At the moment it is unknown about the details of a joint operation, according to the Chicago Tribune, no one was arrested. "Officer hit. We need an escort to a hospital now".
Chicago police said their officers were working with the ATF on an undercover operation when the shooting happened.
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If the attorney is accurate, it delivers another credibility blow to the Democratic Party-financed dossier, which accuses Mr. A heavily redacted version of this memo was submitted to the court, and the judge has requested to see the full memo.
In 2017, the ATF was sent to Chicago 20 agents to coordinate with local authorities fight the epidemic of violence in the city.
A second officer was taken to a local hospital for observation following the Friday shooting but he was not hit by gunfire, police said.
Local media reports said a manhunt is underway for a suspect.
ATF officials also said that the incident occurred while the officer was working on an illegal gun investigation.