The fire was extinguished and firefighters found the bodies of three people - two adults and a child - inside.
Friends tell CTV News that Jason lived with Piper at the home and Amberlee had recently moved back in with them. Jon Stuart of the Nanaimo RCMP in a press conference Wednesday.
"This investigation is still in the initial stages, and may take a significant amount of time due to the complexity of cases involving fires", Stuart said.
The cause of the fire and cause of the deaths are being investigated.
She added that it's not clear if there were working smoke alarms in the home.
A woman, man and their seven-year-old daughter are dead in what police say is a suspicious fire at a home in Nanaimo, B.C.
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They took help from local Jammu Kashmir police and nabbed him. "He could not understand that cops will reach to him". PI Sanjay Nikam, who was heading the team, said that they went through several hard situations during investigation.
Emergency crews were called to a burning laneway house in the 700-block of Nicol Street shortly after noon. "There's no altercation that we have any knowledge of prior to the fire".
The chief wasn't able to speculate about the cause of the fire.
Andy Watson, a spokesman with the BC Coroners Service, says they have very little information to share about the deaths.
The fire is considered suspicious because a point of origin has not yet been determined.
"An investigation like this does take time because we take it slow and we've got to do it as methodically as possible".
Stuart said there's nothing to suggest anyone else was involved in the blaze. Officials with the Nanaimo-Ladysmith school district, where the girl attended elementary school, have also been notified.