The devastating fire in Australia

It was a very sad and devastating moment in Brisbane, Australia. There was a 2 story house which was completely on fire. It happened on Wednesday 12.00am. There were 11 people who died, eight of them were children and 3 of them were adults. After a few minutes the firefighters arrived but it was to late to save their lives.Families of the dead people gathered outside,hand in hand and crying. They were praying,singing the hymns and waiting around the scene.They were only 3 survivors, all of them are men. Families of the dead people were Samoans and Tongans. However the police are still investigating how the fire started. I believe that the house didn't have any fire alarm.  If there were a fire alarm in the house there would not be any dead.