Updated: August 5, 2013 5:24PM
Four people were critically injured early Monday when a sport-utility vehicle flipped over on North Lake Shore Drive.
The SUV was traveling southbound about 2 a.m. when it flipped over about 2 a.m. just south of Irving Park Road, according to Chicago Fire Department officials.
No other cars were involved, police said.
Two of the injured were taken to Northwestern Memorial Hospital in critical condition, according to the fire department. Two others, also in critical condition, were taken to Advocate Illinois Masonic Medical Center.
Police temporarily closed the southbound lanes of Lake Shore Drive between Irving Park and Belmont to clear debris and investigate.
The cause of the crash was under investigation.