Chicago police officer injured in crash on Dan Ryan Expressway

CHICAGO - A Chicago police officer was injured while assisting a motorist on the Dan Ryan Expressway Sunday morning, according to Illinois State Police. 

Troopers responded to a crash in the southbound lanes of I-94 near 31st Street at 6:10 a.m. 

A car was traveling southbound when the driver lost control and struck the left concrete barrier. Chicago police responded, and an officer parked behind the vehicle while helping with traffic control. 

The squad car was struck by another car which caused the CPD vehicle to hit the vehicle they were assisting. 

An officer was transported to an area hospital with unknown injuries. No other injuries were reported. 

ISP says all lanes of traffic reopen at 7 a.m. No further information is available at this time.

Preliminary information indicates the following occurred: ISP Troop 3 responded to the above location for a report of a two-unit crash. Unit 1 was traveling on Interstate 94 southbound near 31st Street when they lost control and struck the left concrete barrier. Unit 2 (Chicago Police Department) was stationary behind Unit 1 with emergency lights activated providing traffic control. Unit 2 was struck by a secondary crash causing Unit 2 to strike the passenger side of Unit 1. Unit 2 was transported to an area hospital with injuries. Unit 1 was uninjured. All lanes of traffic reopened at approximately 7:00 a.m. No further information is available at this time.