Police are asking for witnesses to come forward after a pedestrian was critically injured when she was hit by a car while crossing the street in Winnipeg's West End Wednesday.

The collision happened shortly before 2 p.m. CT at the intersection of Sargent Avenue and Simcoe Street. Video of the incident was captured by a surveillance camera and shared on social media.

"We're trying to build a more complete picture than that video gives us," Winnipeg police Const. Rob Carver said Thursday.

The video shows a woman pushing the button at the crosswalk, pausing and then proceeding to cross the street. Before getting halfway across, she is hit by a dark-coloured sedan travelling west on Sargent.

CBC News has obtained a copy of the video but is not showing the moment of impact, due to its graphic nature.

Watch surveillance video before the collision:

Surveillance video shows pedestrian pressing button before entering crosswalk. CBC is not showing the moment of impact, due to its graphic nature. 0:14

The driver of the vehicle remained on the scene and was arrested by Winnipeg police. Carver said charges have not yet been laid.

The pedestrian remains in hospital in critical condition. A member of her family who spoke to CBC said she is 23 years old and was on her way to work when she was hit.

When he spoke to media on Thursday, Carver was critical of the video being posted to social media. He said the video should have been sent directly to police to eliminate the risk of exposing family members to images of a loved one suffering a devastating injury.

"[I] really wish people wouldn't post video of traumatic events. That's just my opinion," Carver said, adding that the content of the video was potentially useful for investigators.

The family member who spoke with CBC said they supported sharing the video, in the hopes that it might prompt witnesses to come forward. They said the person who posted it first sought — and received — permission from the family.

According to data from Manitoba Public Insurance, nine pedestrians have been killed in motor vehicle collisions in the province so far this year. That's well ahead of the pace in 2018, when a total of 13 Manitoba pedestrians were killed.

From 2018 until present, two pedestrians killed in the province were hit at intersections where they had the right of way. Going back to 2013, an average of fewer than two pedestrians have died at intersections where they had the right of way.

More from CBC News: