A two-vehicle crash occurred in the soutbound lanes of I-57 near 100th Street at about 2:20 a.m., Illinois State Police said. One of the people involved in that crash got out of their vehicle and was then struck by another vehiclle, police said.
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The Chicago Fire Department said a 39-year-old woman was transported to a hospital in grave condition and a 48-year-old man was transported in critical condition.
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Illinois State Police said the crash is alcohol-related.
Police has shut down a stretch of the expressway at Halsted Street for hours before reopening by at about 6:08 a.m.
Further details on the crash were not immediately available.