Seven children, all members of a Syrian family who arrived in Canada about two years ago, have died in a fire that witnesses said quickly engulfed a suburban home.
A woman who lives next door in Halifax said the children ranged in age from three months to 17 years old.
A man and woman remain in hospital, the man with life-threatening injuries.
The woman was expected to survive her injuries.
Imam Abdallah Yousri, of the Ummah Mosque and Community Centre in Halifax, said the family were originally from Raqqa.
Danielle Burt, who lives next door to the family, said she heard a loud bang and a woman screaming just after 12.30am local time.
Ms Burt ran out of the house with her four children and saw the neighbouring parents outside in a harrowing scene.
"The mother was on the grass, praying I guess, bowing her hands down, and pulling on my husband's arm to call 911," she said, becoming emotional.
She said the kids were inside and the dad was sitting on the steps. I think he had gone back in because he was really burnt. It was just awful.
The family have been in Canada almost two years, Mr Yousri said, and originally settled in Elmsdale, north of Halifax.
"Our entire municipality is heartbroken and our thoughts are with the loved ones of the family," Halifax mayor Mike Savage said.
Police said the cause of the fire remained under investigation.
Halifax district fire chief Mike Blackburn said the blaze was very heavy when they arrived, but firefighters were able to get it under control quickly.
He suggested firefighters were deeply affected by what they saw.
"They'll process this over time but it's very difficult and it's not going to get any easier," he said.
PA
