York Regional police are searching for witnesses and the driver of a white pickup truck following a Monday evening hit-and-run crash that left a woman with life-threatening injuries in Markham.

Police responded to a call on Monday at 8:25 p.m. after two pedestrians were hit at Yonge St. and Meadowview Ave., north of Steeles Ave.

Officers arrived to find a 44-year-old man suffering from minor injuries and a 45-year-old woman suffering from life-threatening injuries.

The woman is still in hospital recovering, police said.

The driver of the suspect vehicle, described as a white pickup with a dual axle and a light bar, did not remain at the scene, police said.

Investigators on Tuesday released video that shows the truck appearing to strike the pedestrians while making a left turn from Yonge St. onto Meadowview Ave. The video, which is digitally altered to obscure the victims, shows the driver of the truck briefly stop before leaving the scene a few seconds later.

Investigators are also looking to speak to the occupants of a white compact SUV that was stopped at the light, who police believe likely witnessed the collision.

Police are urging the driver of the pickup truck to seek legal counsel and contact police.

Police are calling on any witnesses who have not yet spoken with police and anyone who may have dash cam footage of the collision to come forward.