A mother and her newborn remain in serious condition after they were in an ambulance crash near Sterling earlier this week.
Swedish Medical Center spokeswoman Julie Lonborg says 43 year old Kelsey Schlichenmayer of Burlington gave birth to a boy several hours after the accident on Tuesday night.
Schlichenmayer has been upgraded from critical condition to serious condition.
The State Patrol says she was the patient in an ambulance traveling from Nebraska to Denver when it slammed into the rear of a semitrailer.
Two people who were also in the vehicle died.
Trooper Eric Wynn says the ambulance driver, 22 year old Chris Larusso of Westminster, and another passenger, 31 year old Dan Beza of Centennial, were injured.
Wynn says the semitrailer driver, Plamen Zelyamov of Chicago, was not injured.
Killed in the crash were 43 year old Karen Woods of Elizabeth, and Vicky Thomas, of North Platte, Nebraska, whose age was not immediately available.
The crash remains under investigation.