Video from a security camera located down the street from the shop in the eastern resort city of Hangzhou showed the blast flinging dust and debris across a major road traversed by cars, buses, bicycles and scooters.
The official Xinhua News Agency said glass was blown out of the windows of vehicles and buildings within a wide radius of the shop. Flames leaped from the building, and state broadcaster CCTV later showed charred shop fronts facing the street in the residential area.
Most such small establishments use bottled gas to fuel their cookers.
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