All northbound lanes of the Kennedy Expressway were shut down in Chicago during rush hour Monday at the Edens Expressway split after a multi-vehicle crash left multiple people with life-threatening injuries, according to Illinois State Police.

The crash happened just after 2:30 a.m. on I-90 northbound at the I-94 Split in Cook County, state police said.

Three vehicles were involved in a crash, which left two people transported to area hospitals with life-threatening injuries.

Traffic was being diverted to the Edens Expressway as police investigated. The Kennedy lane closures remained in place as of 6 a.m. with solid traffic reported.

NBC Chicago's traffic reporter Kye Martin suggests drivers exit at Wilson or at Addison and take local streets to avoid the back-up.

Check back for more on this developing story.