A large field of debris was strewn across the parking lot of the Fountains Plaza shopping center after the blast, with major damage in particular to an LA Fitness gym.
The police chief of Binjai town, Nugroho Tri Nuryanto, said a gas canister explosion may have set off the blaze, but that the cause still needed to be confirmed.
Two firefighters and a Spanish tourist were also killed in the massive blast that gutted part of a building, injured dozen of more people and badly damaged nearby apartments.
The explosion caused the partial collapse of a residential building in the industrial city of Magnitogorsk, leaving hundreds without a home in freezing temperatures on New Year's Eve.
Frida has spent most of her efforts at a school in southern Mexico City where 19 school children and six adults died, but 11 more children were rescued.
Efforts are underway to rescue 33 workers who are trapped underground in western region of Chongqing.
A local official says the explosion occurred during a festival in Spanish town of Velez-Malaga on the southern coast.
Gas explosion in coal mine in northwest Pakistan has killed three miners and left several others trapped
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