Two men in their 20s are in hospital following a collision on Leitrim Road between Bank Street and Albion Road.
A car hit a tree and flipped onto its side just after 1 p.m. Thursday.
Firefighters had to help get the man in the front seat out; he was treated for head injuries and is in serious but stable condition.
It took crews longer to free the driver, whose legs were pinned under the dashboard; he's also in serious but stable condition after suffering serious head injuries.
A third man in his 20s, who was riding in the back seat, got out of the car on his own before first responders had arrived on scene; he has minor facial injuries.
Ottawa police are investigating.