Commuter train service has been suspended to and from Chicago Northwestern Station today in the wake of a shooting in the building.
Multiple people are reported were shot on the 38th floor of the Citigroup Center, which also houses one of the city's main commuter train stations.
Trains will not be moving inbound or outbound again until police notify the rail service that it is safe to do so. Metra crew members are under a lock down in secure areas within the station.