A woman has died after a crash involving a Winnipeg Transit bus in downtown Winnipeg on Friday morning.

The collision between a pedestrian and a bus happened at Portage Avenue and Colony Street around 7:30 a.m. Friday, police said.

The woman was rushed to hospital in critical condition but died of her injuries.

Westbound Portage Avenue is closed to traffic, the Winnipeg Police Service said in a tweet.

Police block off westbound lanes of Portage Avenue Friday morning. (Mohamed-Amin Kehel/CBC )

Police ask people to avoid the area if possible, as traffic disruptions are expected.

The traffic division of the Winnipeg Police Service is now investigating and is asking anyone who witnessed the collision to contact 204-986-7085 or Crime Stoppers at 204-786-8477.