Colorado Springs Police are investigating serious crash that closed Constitution Avenue Saturday afternoon.
Police said a Chevrolet Malibu going east on Constitution crossed over into the west bound lanes of traffic striking a west bound White Chevrolet truck near Trent Avenue just before 4 p.m.
Four people were taken to the hospital. The driver and passenger of the truck were listed as serious but stable Saturday evening. The driver and passenger of the Malibu were listed as critical and unstable.
Police closed down lanes of Constitution between Circle Drive and Chelton Road until 6:50 p.m. to investigate the crash.
The names of the people involved in the crash have not been released.