CHICAGO (CBS) — At least two people were killed in separate crashes on Interstate 57, according to Illinois State Police. The first crash happened around 8:40 p.m. Wednesday in the northbound lanes of I-57, south of 159th Street. That's where state police said troopers responded to the crash involving "multiple injuries and at least one fatality."

At least two people died in two separate crashes on I-57 in Chicago's south suburbs, Illinois State Police said.

Two people were killed in a crash involving a garbage truck and two other vehicles Thursday in the south suburbs, authorities said.

It is unclear what led to the crashes. State police said that both remain under investigation.