One man is dead and a woman was taken to hospital with critical injuries after a shooting in the city's south end on Sunday night, and police say no arrests have been made.
Ottawa police were called to a townhome on Patola Private, near the intersection of Albion Road and Cahill Drive, close to the South Keys Shopping Centre, at approximately 7:20 p.m.
According to police and paramedics, a man was shot and pronounced dead at the scene.
A young woman was also shot, and was rushed to the Ottawa Hospital's Civic campus trauma centre in critical condition.
As of 9:30 p.m. about 20 officers remained on the scene, including a police negotiator. One hour later, police said a suspect was still barricaded inside a home.
They urged people living nearby to stay inside and follow officers' instructions, and some were asked to leave their homes as a safety precaution.
Just before 1 a.m. Monday, police said the operation had concluded and that people could return to their homes and normal activities.
Neighbours told CBC News they had heard a loud argument at a barbecue prior to the shooting.
Ottawa police Sgt. Peter Van Der Zander is encouraging residents to come forward with more details.
"We're only as good as the information that comes to us," he said in an interview at the scene Sunday night.
"This is a complex investigation. This will be time consuming. This investigation will not be concluded today, tomorrow, this week or probably even this month. This is the type of investigation that will take time."
Ottawa police Sgt. Peter Van Der Zander is asking residents to come forward with information about Sunday night's shooting. (Radio-Canada)
Commentary by the Ottawa Mens Centre
To learn more about Sgt. Peter Van Der Zander go to a page that lays out
how he fabricates evidence and obstructs justice.
Peter Van Der Zander is yet an unconvicted criminal employed
by Ottawa's largest criminal organization, The Ottawa Police.