Three suspects surrendered to police around 10:30p.m. They were holed up in a building since about 4:30 p.m. after police arrested another person in the investigation.
The situation forced the CTA to shut down parts of the Red and Purple train lines. That service was still shut down as of 10:30 p.m. but was expected to reopen after police gave the all-clear.
The standoff took place near Broadway and Wilson in the Uptown neighborhood.
Chicago police joined forces with a task force from the Bureau of Alcohol, Tobacco and Firearms to take the offenders into custody. The scope of the operation took over the 4600 block of North Broadway with police apprehending one person and negotiating the safe apprehension of others in what was being called a barricade situation.
As a safety precaution, police requested the CTA suspend service on the Red Line between Addison and Berwyn. It happened just as riders were gearing up the evening commute.
"I feel like they are handling it, all things considered, all right. It's just that everything is so congested and chaotic, no one really knows what's going on," Joseph Ramski, commuter.
"Normally I would be home right now and I could be watching this on TV," said Antonio Bacon, commuter. "Now I am here because people want to be crazy."
The temporary suspension lasted hours with riders being advised to take shuttle buses to get to their destinations. The scene drew onlookers all evening and people who lived near the scene were advised to be safe.
"They just told us it's better for us to stay inside, stay away from the windows and stay inside," said Jason McAllister, neighborhood resident.
"The first thing I heard is there is police everywhere, it's going to take you a long time to get home, leave yourself more time. And then the nest message I got was the Red Line has not been running for hours so you're going to have to find another way home," said resident Kate Anthony.
There are unconfirmed reports that one of the suspects is a fugitive from another state.
For the latest on CTA service, visit www.transitchicago.com.