Two people were injured in separate hit-and-run crashes in the Logan Square neighborhood.
The first accident happened near Fullerton and Lawndale around 7:30 Tuesday night.
A 17-year old girl was crossing the street on a crosswalk when she was hit by a black pick-up truck.
The pickup truck drove off. Police are still looking for that driver.
The girl was taken to Advocate Illinois Masonic Medical Center in critical condition.
About an hour earlier, a man in his 30′s was hit by a red car at Fullerton and Leclaire.
He was also taken to Advocate Illinois Masonic Medical Center, in serious condition.
The 18-year-old driver in that crash later turned himself into police.