Ottawa police continue to search for the driver of a transport truck, which is believed to have struck and killed a woman downtown, as well as possible witnesses to the crash.

Pedestrian struck on Rideau Street at Waller Street

Police say a woman was struck on Rideau Street near Waller Street at about 6 a.m. on Feb. 21, 2014. (Ryan Gibson/CBC)

On Saturday, police sent out a second call for witnesses who might have seen the pedestrian hit as she walked along Rideau Street near Waller Street at about 6 a.m. Friday.

Police said a B-Train transport truck — a transport truck pulling two trailers — hit the woman and then drove off.

The Ottawa police collisions unit is investigating the crash.

Police said an autopsy has been scheduled on the woman's body.

Anyone who witnessed the collision is asked to call the unit at 613-236-1222, ext. 2481.