A 69-year-old woman suffered life-threatening head injuries after she and two others, including a child in a stroller, were struck by a pickup truck.

The woman was walking the child with a 68-year-old man when they were struck at 9:23 a.m. Wednesday morning at the intersection of Centrepointe and Tallwood drives.

An Ottawa woman is in critical condition after she was hit while walking child with a stroller across an intersection.An Ottawa woman is in critical condition after she was hit while walking child with a stroller across an intersection. (Steve Fischer/CBC)

Paramedics said the woman may have also suffered spinal and internal injuries in the collision.

The man was treated for arm and rib injuries and is in stable condition in hospital.

The 17-month-old girl in the stroller was treated for minor scrapes and bruises, paramedics said.

The driver of the truck, a 49-year-old man from Ottawa, was not injured.

The Ottawa police's collision unit is now investigating the crash but they do not believe excessive speed or alcohol were factors in this collision.

Police are looking for witnesses and they are asking them to call 613-236-1222, ext. 2481 or Crime Stoppers at 613-233-8477.

Area roads were closed for a time but they were reopened.