Four people were critically injured in a rollover crash overnight on Lake Shore Drive.
Officials said the car was traveling south on LSD when it flipped over around 2 a.m. at Irving Park Road. It was the only vehicle involved in the crash.
The full extent of the injuries is still unknown, but two people reportedly were taken in critical condition to Advocate Illinois Masonic Medical Center and two in critical to Northwestern Memorial Hospital.
Crews quickly cleared the scene to reopen Lake Shore Drive in time for the morning commute.
The crash remains under investigation.