OTTAWA - Ottawa Paramedics say a man has died after being hit by an OC Transpo bus Tuesday morning.

The pedestrian was struck on Russell Rd. near Southvale Cres. just before 8:00 a.m.

Paramedics initially said he was in critical condition, but later confirmed he died at the scene.

"Bystanders initiated CPR and tried quite aggressively to resuscitate the male who was in cardiac arrest," said Marc Antoine Deschamps, with Ottawa Paramedics.

The city says OC Transpo is working with police on this investigation.

"Our thoughts are with the family and friends of the victim. OC Transpo is collaborating with the Ottawa Police Service’s investigation. OC Transpo will also undertake an internal investigation,” Chief Safety Officer Jim Hopkins wrote in a statement to CTV News. 

Ottawa Police closed Russell Rd. between Walkley Rd. and St. Laurent Blvd. for the investigation. Roads are open again. 

Police interviewed several witnesses at the scene. The investigation is ongoing.