The bus eventually stopped on I-94 at Rt. 173.
A passenger called 911 and said a man armed with a gun had threatened to kill people on the bus, according to the sheriff's office in Racine County, Wisconsin, several miles north of the IL border. The man allegedly made threats to kill people as the bus was traveling from Milwaukee to Chicago, according to the Racine County Sheriff's Office. Wisconsin police responded and initiated a pursuit, which crossed into IL.
About 40 Greyhound passengers were safely removed from the bus, police said.
Police initially said they were responding to a possible hostage situation, but further details were not released about what happened on the bus. Authorities received a report of a disorderly and possibly armed suspect on the bus.
Because of this incident, all lanes of southbound I-94 near Wisconsin 50 in Kenosha County were shut down. There were also closures and backups in both directions of the interstate at the state line.
This is a developing story, stay with tmj4.com for updates.