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An arson at a home in Richmond Hill is now being investigated as a homicide after an 11-year-old child died in hospital, York Regional Police say.

The fire tore through a home in the area of Yonge Street and Gamble Road shortly before 3 a.m. on Sept. 1.

Jim Kettles with the Office of the Fire Marshal (OFM) previously said that four people who were pulled from the home were trapped, with at least one of them found in a second-floor bedroom. A fifth person was found outside the home.

Police said all five people, including one child, were transported to hospital in critical condition. On Tuesday, an 11-year-old girl injured in the fire died in hospital, police confirmed at a news conference on Wednesday.

Police previously said the other victims are believed to ages 70, 59, 42, and another person in their mid-20s.

“The victims are still in the hospital and in critical condition. There is no further information I can provide,” Insp. Paolo Fiore told reporters on Wednesday.

Sources told CP24 earlier this week that all five patients are members of the same family.

A red gas canister was visible underneath a tree near the home at the time of the blaze and police have now confirmed that arson is suspected.

richmond hill, fire A red gas cannister is seen near the site of an arson at a home in Richmond Hill on Sept. 1, 2025. (Beatrice Vaisman/ CP24)

No arrests have been made.

“It is very early on. It is a very active investigation,” Fiore said. “At this point in time, we do not have a suspect description.”

He noted that investigators are still working through video surveillance footage and canvassing the area for witnesses.

With files from CP24’s Joshua Freeman