BBC News, Toronto - Canadian police are treating the deaths of four children and two adults at a house in Ottawa as homicides. Officers were responding to an emergency call placed at approximately 22:52 local time (03:52 GMT) on Wednesday when they found the six people. Ottawa police chief Eric Stubbs has described the incident as a "mass shooting".

Police said one male suspect has been arrested.

Sri Lanka's High Commission in Ottawa told the BBC on Thursday that the victims were a family of Sri Lankan nationals.

The commission did not provide further details, referring questions to police.

In a statement early on Thursday morning, the Ottawa Police Service called the investigation into the deaths "tragic and complex".

Officials have also said that at least one person had been taken to hospital in the Ottawa area with serious but not life-threatening injuries.

They added that there was no ongoing threat to public safety.

Chief Stubbs called the incident a "real tragedy" that would continue to have a "significant" impact on the whole city.

Police said one male suspect has been arrested.
Sri Lanka's High Commission in Ottawa told the BBC on Thursday that the victims were a family of Sri Lankan nationals.
The commission did not provide further details, referring questions to police. In a statement early on Thursday morning, the Ottawa Police Service called the investigation into the deaths "tragic and complex".
Officials have also said that at least one person had been taken to hospital in the Ottawa area with serious but not life-threatening injuries.