Four people, including two children, have been rushed to hospital following a two-vehicle crash on Blair Rd. along the 174 overpass.
Paramedics say they were called the scene a few minutes before 9 a.m. Saturday morning.
Paramedics say one vehicle rolled over. Ottawa fire crews helped to extricate three people trapped inside one of the vehicles.
A 7-year-old girl suffered head and chest injuries, and was rushed to hospital in serious condition.
An 8-year-old boy was transported in stable condition, also with head and chest injuries.
A 45-year-old woman with a back injury and a 44-year-old man with back and neck injuries were taken to hospital in stable condition.
Ottawa Police are investigating.